As of 4.7.5 there is a Google Analytics 4 “Connection” and “Query” node available. The nodes will also be part of the 5.1 release, although with a modern dialog. The “old” nodes will support Universal Analytics for as long as that API is around.
The community already identified some… oddities? when working with GA4. I posted some info on them in this forum thread. For example, it seems Google Analytics does not actually migrate data when “Migrating from Universal Analytics to Google Analytics 4”, which might make some queries end up being surprisingly empty.