Would a boss engage his employees to talk to a certain outcast or is it rather unlikely?

A month ago our team got a new manager who is very motivated and tries to do everything right. He took the time to get to know every one in a one on one meeting and found out that I was not as sociable as the rest of the team. While I thought it was not a big deal since it didn’t really interfere with my work he offered to help me get more included and now keeps checking in on me several times a week. Weeks later I saw him in a meeting with a coworker who always ignored me and this coworker would look up and stare at me every time I walked by and look slightly surprised at me. For some reason he takes an effort to greet me and act nice instead of passive aggressive and rude. Could it be that my manager told other coworkers to talk to me more? Because i find it quite embarrassing.

Would a boss engage his employees to talk to a certain outcast or is it rather unlikely?
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