Hello @neikoloves,
First, the project is not dead, we are here to support our users.
For now, accessing GA4 properties/streams is not possible, as the API is still in beta :
https://developers.google.com/analytics/devguides/config/admin/v1
Warning: This is an early preview version of the API and is subject to change. While we will try to notify you of upcoming changes, you should expect to encounter breaking changes before the APIs are publicly released.
As soon as Google releases the final version of their API, we will add GA4 to the widget.
For now, you can create new properties with both “GA4” and “UA” tracking codes, which will be visible in the widget.
When you create a property, click on “Show Advanced Options” and click on “Create a Universal Analytics Property”.
Please be advised, this will not work for already created properties, as you need to create a new property, to have the “advanced options”.
As for “Google Site Kit”, its their own system and API, they know what will be in the final release, we don’t.
Also, it is not our fault that Google decided to announce the deprecation of V3, without a finalized, released API for GA4.
With that said, and by popular demand, we are trying to release a compatible version very soon (using the 1st version of the current beta API).
I hope it is clear now.