It says I am not allowed to request moderation without having email verification tied to my account, the issue is that I've had this enabled since day 1, as it is mandatory for all leaderboard moderators. I can't even toggle it off and on again to try fix this, as again, it is mandatory and unchangeable.

Please fix this oversight so I can be added to a game with an inactive mod, thanks.

It's a known bug. You need to go to your account settings and save them (even without changing anything). This will correctly set the flag for email verification for you.