100%, separate church and state.

especially if you're signed into an account that manages your phone. As we discovered its perfectly possible (or was) to remote wipe a personal android phone if they are signed in using your company google account.

but less paranoid-ly it means you can put your workphone physically else where so you are not tempted to "check in" or have out of hours fun ruin your time off.

Definitely not advocating for the same device used for work and personal stuff, but for on call I think extra work device (phone), if not really needed other than receiving a ping, is just useless. Apps that notify you about incidents are not really doing anything "outside" of on-call shifts.