We really need to think about a better name than "Early access". At this point I think I've used Lawnchair for about 5 years, 5 years after the initial event is only "early" in the context of geological eras.
To me this is a feels like a full blown release as I've been using the beta, alpha, the builds on a fork of one of the maintainers github fork, ... All of them with very few issues.
The first version (or I guess second? It's called V2) has been available on google play for many years as mentioned by @Jrockwar@feddit.uk but isn't updated anymore. I have a Pixel 3a so still use it but this new one is not the first release or anything.