Apple Mail Problems w/Gmail

This is so frustrating. For every solution that looks like it could work, there's something that prevents it from working. I tried the app password solution. But when I pull up mail accounts, and go to server settings to replace the password with the app password that was generated, there's no place to put in a password. All it shows is "outgoing mail account", there's nothing for incoming. The instruction page in google looks completely different than the account info that actually comes up for me. I'm looking everywhere as to where I would actually enter a password for this account, and can't find anything. I even went into Help for Mail. It just says the settings that I see vary depending on the account type. (incidentally, my account that is a POP server looks like what google shows I should see for the IMAP server.

This is very frustrating.

That's what the instructions that google gave me said to do.

When I go into google, it tells me the devices authorized to use my account, and my iMac shows up, and says it's been inactive for 79 days (when my account went off line). Do you think it would work if in google, I signed out of the device; and then signed back in?

I have the actual password, that's not the problem.

It's a moot point, I just ordered a new Mac Studio, and get it in a couple of weeks. This one is almost 10 years old, and having other issues more serious than the gmail issue. I'm sure once I get the new Mac and set up Apple mail, this problem won't exist. Fingers crossed.

Thanks for your help ,though, I appreciate your time.

This is what the google instructions show:

And this is what my Apple mail shows for this account:

Thank you for the info, I will try these and see if they work. What I don't understand is why it happened to only 1 of the 4 gmail accounts that I have.

If I don't replace the password with the App PW, do you know where I use the app PW?