Welcome! This is a community for all those who are interested in protecting their privacy.
PS: Don't be a smartass and try to game the system, we'll know if you're breaking the rules when we see it!
Some of these are only vaguely related, but great communities.
Use something like NoScript, Ublock Origin, or an Adblocker and simply block the Google domain (could do it with hosts file too).
There's another, less sledgehammer way to do it, I just forget at the moment.
If you do a web search for it, there are numerous published ways.
https://techpp.com/2024/05/28/disable-sign-in-with-google-on-websites/
In the ublock origins settings, go to filter lists. Under annoyances, enable the easylist - annoyances list.