Trying the SameSite attribute fix for the google recaptcha v2 warning on Chrome 77 doesn't seem to be working for me?
The warning is specifically for the cookie coming from "google.com" so you will not be able to affect it. If any of the console warnings refer to domains you control, then you should be following that advice to update your SameSite attributes.
It does mean that you will continue to see these warnings until the affected domains update their cookies, which should be happening over the coming months. The enforcement of this behaviour is not planned until Chrome 80, which will be stable in February. So, no actual site/service functionality should be affected in stable Chrome before then.