This is why I don't use SSO for personal affairs, unless required. The convenience is not worth it to me, especially because I just use a password manager to log me in anyway. The provider will just cut you off at a moment's notice and then tell you to shove it. Besides, logging in is faster than having to be redirected to another page just to use my password manager to log in to my google account, redirect me back and then I'm in...just log in directly.

I also never, ever, for any reason, no matter what, no matter where, or who, or who I am with, or where I am going, or where I've been... ever, for any reason whatsoever link a business email account to a personal account. I use different browser profiles and keep all that stuff segregated.