Hello,
I have two LWCs that are connected via an LMS channel.
LWC 1:
     - creates a custom record, and the related child records
     - publish a LMS channel and populate it with the ids
     - navigate to the record page the contains LWC 2  
LWC 2:
     - subscribes the LMS channel published by LWC1
     - retrieve the ids from the channel in connectedCallback
     - load the page with the custom record and related child record data

I can see the IDs in LWC 1 prior to navigating to the LWC 2. When LWC 2 loads connectedCallback is called but no ids are there. A snipet of the code is below. Any feedback on what I'm doing wrong?

// LWC 1 - A modal that contains the custom logic for creating a new Custom Object A record when the object +New Component Button is clicked
// - this component also does the following:
//     ** creates the related child component records
//     ** publishes an LMS channel with the Ids of the child components
//     ** navigates to the record page that contains the Custom Object A that was just created and the child component ids
import { LightningElement, api, wire } from 'lwc';
import { publish, MessageContext } from 'lightning/messageService';
import CUSTOM_OBJECT_A from '@salesforce/schema/Custom_ObjectA__c';
...
import MY_CHANNEL from '@salesforce/messageChannel/My_Id__c';

export default class CustomObjectACreator extends NavigationMixin(LightningElement) {
    @wire(MessageContext)
    messageContext;            
    
    customObjectApiName = CUSTOM_OBJECT_A;    
    
    @api recordId;  //The record Id set by the framework

    ...
    
    //Id's of Child Components. These are set when createRecord is executed in the child component 
    @api childComponent1RecordId = 'XXXXXX11111';
    @api childComponent2RecordId = 'YYYYYY22222';
    @api childComponent3RecordId = 'ZZZZZZ33333;  
       
    ...
    
     handleCreateCustomObject(event) {    

        //publish message with ids here...
        const payload = {
            childcomponent1recordid: this.childComponent1RecordId,
            childcomponent2recordid: this.childComponent2RecordId,
            childcomponent3recordid: this.childComponent3RecordId
        };        
        publish(this.messageContext, MY_CHANNEL, payload);  
        
         
        //Navigating to Record Page        
        this[NavigationMixin.Navigate]({
            type: 'standard__recordPage',
            attributes: {
                recordId: this.recordId,
                objectApiName: this.customObjectApiName,
                actionName: 'view'                
            }            
        });  
        
    }            
    
}


// This component is on the record page responsible for displaying the Custom Object A data with the related child components data
// This component also:
// - subscribes to the LMS channel published by LWC 1above
// - in connectedCallback, call the method to retrieve the related child component ids. NO IDs ARE PRESENT
// - load the related child components data based on the ids received from the LMS channel.
import { LightningElement, api, wire } from 'lwc';
...
import { subscribe, MessageContext } from 'lightning/messageService';
import CUSTOM_OBJECT_A from '@salesforce/schema/Custom_ObjectA__c';
...
import MY_CHANNEL from '@salesforce/messageChannel/My_Id__c';

export default class CustomObjectA extends LightningElement {
    
    ...
    //Id's for child components related to the Custom object 
    childComponent1RecordId;
    childComponent2RecordId;
    childComponent3RecordId;
 
    subscription = null;   
    
    //The Custom Object reference
    customObjectApiName = CUSTOM_OBJECT_A.fieldApiName;

    ...  
    
    connectedCallback() {        
        this.subscribeToMessageChannel();            
    }
    
    @wire(MessageContext)
    messageContext;

    // Encapsulate logic for LMS subscribe.        
    subscribeToMessageChannel() {
        this.subscription = subscribe(
            this.messageContext,
            SUBTASK_ID_CHANNEL,
            (message) => this.handleMessage(message)
        );        
    }    

    //Handler for message received by component. WHY CAN'T AM I NOT GETTING IDs HERE?
    handleMessage(message) {    
        console.log('CustomObjectA.handleMessage - childComponent Ids are: ', JSON.stringify(message));
        this.childComponent1RecordId = message.childcomponent1recordid;            //SHOULD BE: XXXXXX11111
        this.childComponent2RecordId = message.childcomponent2recordid;            //SHOULD BE: YYYYYY22222
        this.childComponent3RecordId = message.childcomponent3recordid;            //SHOULD BE: ZZZZZZ33333        
    }    
   ...    
    
}