Well logged into forum today to find this 2fa crap, do it or no forum! Really not necessary for a forum. 14yrs and no problems. Anyhow, don't like having to use phone apps so chose the email route only to find they sent the code to an email address I don't use despite the fact my current email address has been so for years and then spoke to customer service who confirmed my current email address is correct. So why is the code being sent to an email address I don't use and haven't for years. Couldn't make it up. Forced to use phone app on the wife's phone, google authenticator, which did the trick. I'm getting on a bit and don't like this ****. To be honest the way prices have been, particularly graphics cards it seems, my days of tinkering and home builds are coming to an end, maybe just as well eh!
Forum email and store email are separate - maybe you updated your store email address when you switched over but didn't update your forum email address?