With Google domains transferring to Squarespace I’ll be transferring my one remaining domain with them to something else soon enough.
I already moved all of my other domains over to a local provider I use for work that has treated me well, but this one last google domain address has my self hosted services on it and I was using some features that I didn’t want to have to transfer so I kept it with google. I was using their ddns service too but my IP is now sticky (effectively static but can change in some rare circumstances) and it has only changed once in the last 3 years so I think I’ll just manually manage the A records if needed until I either go fully static or use a third party ddns provider. I also use email aliasing to use me@mydomain with gmail.