Fixed following issues related to cloud deployment:

1) No options are shown in the instance type.
  2) No options for the last 2 types.
  3) Unable to change Storage config - size and iops
  4) Unable to create an instance when pgAdmin is installed using the installer in Desktop mode
  5) Can not create cloud instance with the temporary credentials.
  6) Mapped region display name (hardcoded) with region code.

web/pgadmin/misc/cloud/static/js/CloudWizard.jsx

@@ -87,7 +87,7 @@ export default function CloudWizard({ nodeInfo, nodeData }) {
             var _url = url_for('cloud.get_aws_db_instances') ;
 
             if (engine) _url += '?eng_version=' + engine;
-            if (reload) {
+            if (reload || options === undefined || options.length == 0) {
               api.get(_url)
                 .then(res=>{
                   let data = res.data.data;

web/pgadmin/misc/cloud/static/js/cloud_db_details_schema.ui.js

@@ -200,9 +200,9 @@ export class InstanceSchema extends BaseUISchema {
       deps: ['aws_db_version', 'aws_db_instance_class'],
       depChange: (state, source)=> {
         if (source[0] == 'aws_db_instance_class') {
-          state.reload_instances = false;
+          return {reload_instances: false};
         } else {
-          state.reload_instances = true;
+          return {reload_instances: true};
         }
       },
       type: (state) => {
@@ -215,6 +215,7 @@ export class InstanceSchema extends BaseUISchema {
           controlProps: {
             allowClear: false,
             filter: (options) => {
+              if (options.length == 0) return;
               let pattern = 'db.m';
               let pattern_1 = 'db.m';
 
@@ -260,26 +261,31 @@ export class StorageSchema extends BaseUISchema {
       },{
         id: 'aws_storage_size', label: gettext('Allocated storage'), type: 'text',
         mode: ['create'], noEmpty: true, deps: ['aws_storage_type'],
-        depChange: (state)=> {
-          if(state.aws_storage_type === 'io1') {
-            state.aws_storage_size = 100;
-          } else if(state.aws_storage_type === 'gp2') {
-            state.aws_storage_size = 20;
-          } else {
-            state.aws_storage_size = 5;
-          }
+        depChange: (state, source)=> {
+          if (source[0] !== 'aws_storage_size')
+            if(state.aws_storage_type === 'io1') {
+              return {aws_storage_size: 100};
+            } else if(state.aws_storage_type === 'gp2') {
+              return {aws_storage_size: 20};
+            } else {
+              return {aws_storage_size: 5};
+            }
         },
         helpMessage: gettext('Size in GiB.')
       }, {
         id: 'aws_storage_IOPS', label: gettext('Provisioned IOPS'), type: 'text',
         mode: ['create'],
         visible: (state) => {
-          if(state.aws_storage_type === 'io1') {
-            state.aws_storage_IOPS = 3000;
-            return true;
-          }
+          if(state.aws_storage_type === 'io1') return true;
           return false;
-        } , deps: ['aws_storage_type']
+        } , deps: ['aws_storage_type'],
+        depChange: (state, source) => {
+          if (source[0] !== 'aws_storage_IOPS') {
+            if(state.aws_storage_type === 'io1') {
+              return {aws_storage_IOPS: 3000};
+            }
+          }
+        },
       },
     ];
   }

web/pgadmin/misc/cloud/utils/aws_regions.py

@@ -0,0 +1,36 @@
+# ##########################################################################
+# #
+# # pgAdmin 4 - PostgreSQL Tools
+# #
+# # Copyright (C) 2013 - 2022, The pgAdmin Development Team
+# # This software is released under the PostgreSQL Licence
+# #
+# ##########################################################################
+#
+# # AWS Regions
+
+
+AWS_REGIONS = {
+    'us-gov-east-1': 'AWS GovCloud (US-East)',
+    'us-gov-west-1': 'AWS GovCloud (US-West)',
+    'ap-east-1': 'Asia Pacific (Hong Kong)',
+    'ap-south-': 'Asia Pacific (Mumbai)',
+    'ap-northeast-3': 'Asia Pacific (Osaka-Local)',
+    'ap-northeast-2': 'Asia Pacific (Seoul)',
+    'ap-southeast-1': 'Asia Pacific (Singapore)',
+    'ap-southeast-2': 'Asia Pacific (Sydney)',
+    'ap-northeast-1': 'Asia Pacific (Tokyo)',
+    'ca-central-1': 'Canada (Central)',
+    'cn-north-1': 'China (Beijing)',
+    'cn-northwest-1': 'China (Ningxia)',
+    'eu-central-1': 'EU (Frankfurt)',
+    'eu-west-1': 'EU (Ireland)',
+    'eu-west-2': 'EU (London)',
+    'eu-west-3': 'EU (Paris)',
+    'eu-north-1': 'EU (Stockholm)',
+    'sa-east-1': 'South America (Sao Paulo)',
+    'us-east-1': 'US East (N. Virginia)',
+    'us-east-2': 'US East (Ohio)',
+    'us-west-1': 'US West (N. California)',
+    'us-west-2': 'US West (Oregon)',
+}

web/pgadmin/misc/cloud/utils/rds.py

@@ -13,6 +13,7 @@ import boto3
 import pickle
 from flask import session
 from boto3.session import Session
+from .aws_regions import AWS_REGIONS
 
 
 class RDS():
@@ -163,9 +164,11 @@ def get_aws_regions():
     _session = Session()
     res = _session.get_available_regions('rds')
     regions = []
+
     for value in res:
-        regions.append({
-            'label': value,
-            'value': value
-        })
+        if value in AWS_REGIONS:
+            regions.append({
+                'label': AWS_REGIONS[value] + ' | ' + value,
+                'value': value
+            })
     return True, regions