Accessing and using Microsoft Teams on smartphones and tablets across platforms
I found the solution for this...
followed below steps and issue solved for me on poco f5 phone and tried same on other redmi phone as well and worked :)
if you have installed teams only on work profile then install teams on personal profile as well.
ensure to enable all the notifications on work profile teams and personal profile teams ( specially permanent notification should be enabled for both )
disable battery saver for both.
enable autostart for both.
Let me know if it solves your issue.