Temporary workaround: ↓ (copy of 1st of July)
https://web.archive.org/web/20230701010714mp_/https://react-google-maps-api-docs.netlify.app/#section-introduction
BEWARE as instructed in Slack by the lib owner DO NOT ENTER YOUR Google Maps API Key as it could eat your budget. I would personally just use it as reference until the official docs are back (not sure if my current Map implementation with this lib is purging the budget, so track yours carefully).
P.S
I've joined their Slack and the owners seems to be aware of this problem, but have no time fixing it. Hopefully a contributor will find & fix the issue. We can only wait for the official fix.