I have a couple (e.g spam, uni, personal) and it’s so profoundly unhelpful to make me sign into them one at a time by coordinating between 2 or more different devices. an occasional spot check for security would make sense if I was just booted out of one account, but instead it logs me out of every single one at once?? What gives?
Technically, you’re not allowed to have multiple Google accounts from their perspective. So the tooling isn’t setup for it. You’re probably also looking like a bot to them.
I’d suggest using the profile feature in Firefox so you can configure different contexts based on your needs such as a personal, uni and spam profile.
They also sell a hardware authentication device that might help simplify matters. It’s called a Titan Security Key. You would need to research it to find out if it’ll support being bound to multiple accounts.
I use container tabs for that. Makes it easy to keep two logged in accounts side-by-side.