Lightning Message Service & Code Builder

Can LMS be used to publish and subscribe to a nested custom LWC that is contained within a Salesforce Standard component on the Page? Tabs is a standard component when building a Flexipage. That Tabs standard component can contain a custom component, in my case a custom lighting-tabset. I have not been successful creating this communication. Ultimately, I am trying to activate a Tab in the nested lightning-tabset. I do not think this can be done or I am doing this wrong, haha. A - standard tab component would need to be on the specific tab in which the child LWC component resides to allow connectedCallback to initiate. B - I don't believe your can navigate through the standard Tab component and "land" on the nested custom LWC component lightning-tabset. Is my understanding correct?

Thank you for the video it was very helpful

Hi, thanks for the video! Just wondering - do you know how & where in Setup to: a) find Lightning Message Service channels you've deployed, and b) completely delete them from the Org? Thanks Again!!

How can I get access to code builder ? I am working professional/freelancer. Is there way I can enable it to my developer org ?