How hard is it to use a separate password manager and MFA app? I personally don’t keep any MFA codes in keychain because it’s not convenient to retrieve the passcode in most cases.
You're posting this on an Apple forum so I have to ask: how is not convenient? If you use iCloud Keychain + Safari everywhere, it's ridiculously convenient. I went through some contortions in order to migrate my Symantec VIP codes to iCloud Keychain just so I could have that sweet code integration.
I can’t use my 2FA codes on devices that aren’t connected to my Apple ID, my work devices use Apple Business Manager apple IDs. I have a PC I use for Sony Vegas, etc.
you can still view the generated codes in the settings app on your devices that are signed into your personal apple ids. not super convenient but possible.
I’m on all the betas so I can’t be sure if it’s available to everyone but apple’s keychain gives you the option of using Authy or google chrome 2FA codes so, at least on Mac, your codes will auto-populate