If your employer requires you to have a phone for official use, keep it separate from your personal phone; different device, different number, different networks if possible (ie: only let it join your home’s guest network). Don’t do personal things on your work devices, including logging into personal services, social networks or communication tools.
Microsoft does the same crap with Office 365’s apps that support both a personal and corporate account. I have to authenticate with my company if I want to use outlook to access my personal account. If you have multiple accounts, and one is corporate, your IT team can enable enterprise privacy crap that sits on top of the entire client, including personal accounts.
The obvious workaround is to not use outlook for personal email, but still, WTF.
Every company tries to get people to use personal phones. It takes some gumption to refuse.
My company pays a flat $80 each month for us to use our personal phones. I don’t think they have any access outside of their Microsoft 365 stuff. I like it better than having to manage two phones but I know people here are crazy about privacy.