Hello Everyone,
I want to be able to trigger events and sending info to Google Analytics 4 (GA4), using javascript.
Following this link developer google I am able to create tags and triggers but, I am obligated to use Google Tag Manager for every single client we have, since for every client we have a separate domain so I need to add every domain in tag assistant and create the tags and triggers.

If I have for example 100 clients to manage, then is it rational to do all repetitive procedures for all of them, including the same tags and triggers? In fact I am searching to find a method I can do once and apply them for all clients.
In tag assistant, after I click a button which triggers a tag and event I have

having these info as datalayer.push can I simplify my tasks? for example a piece of java script which may do the same push to datalayer?
I have even created another container to test if I could have access to the previous tags and triggers, but it just open a new "Empty workspace" like the following photo:

Thanks