If any of the "normal" apps (Google Authenticator, Microsoft Authenticator) had a monitoring backend that my employer could use, I'd be angry with Google/Micros

If any of the "normal" apps (Google Authenticator, Microsoft Authenticator) had a monitoring backend that my employer could use, I'd be angry with Google/Microsoft for adding that functionality rather than upset that my employer made me install it. I don't want to carry around two devices so I'd much rather have company apps on my phone. Obviously, that is as long as the apps seem resonable, like a 2FA app. If I had to install "person location tracker by shadycorp" I'd just refuse even on a corporate phone. But 2FA app on my personal phone vs being required to carry 2 devices? I think the first is much more appealing.