WH removed Teams app from his phone and AP is a coworker

DDay will be one year ago tomorrow. I have been feeling so much better about things and WH has been going to counseling and doing the work. We have an open phone policy and I will occasionally check his phone. He still works with AP. I hate that but it is the situation. I recently noticed that he has removed the Microsoft Teams app from his phone. He also removed FB Messenger. This means he has these apps on his work laptop, which he keeps at work. I am not liking this development. I feel like there must be something to hide for these to be removed. Thoughts?