Nested Multifield within multifield in content fragment model not working in aem .

Hi @padmanabhsaoji 

1. Define the outer multifield: In your Content Fragment Model, define the outer multifield as you normally would. 

   {
       "title": "My Multifield",
       "name": "./myMultifield",
       "fieldLabel": "My Multifield",
       "xtype": "multifield",
       "addLabel": "Add Item",
       "fieldConfig": {
           "xtype": "textfield",
           "name": "./myTextField",
           "fieldLabel": "My Text Field"
       }
   }
   

2. Define the inner multifield: In the fieldConfig object of the outer multifield, define the inner multifield as a custom xtype. For example:

   {
       "title": "My Multifield",
       "name": "./myMultifield",
       "fieldLabel": "My Multifield",
       "xtype": "multifield",
       "addLabel": "Add Item",
       "fieldConfig": {
           "xtype": "custommultifield",
           "name": "./myCustomMultifield",
           "fieldLabel": "My Custom Multifield"
       }
   }
   

3. Define the custom xtype: In your Content Fragment Model's client library, define the custom xtype for the inner multifield. For example:

   CQ.Ext.define("myproject.CustomMultifield", {
       extend: "CQ.form.MultiField",
       constructor: function(config) {
           config = config || {};
           var defaults = {
               "fieldConfig": {
                   "xtype": "textfield",
                   "name": "./myInnerTextField",
                   "fieldLabel": "My Inner Text Field"
               }
           };
           config = CQ.Util.applyDefaults(config, defaults);
           myproject.CustomMultifield.superclass.constructor.call(this, config);
       }
   });
   

4. Include the client library: In your Content Fragment Model's dialog, include the client library that defines the custom xtype. For example:

   <cq:dialog
       ...
       <cq:includeClientLib categories="myproject.custommultifield"/>
       ...
   </cq:dialog>

   https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/nested-multifield-in-content-fragment-aem-6-5/m-p/421857 
   https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/multifield-in-content-fragment-model/td-p/246514