Biden won Michigan by almost 3 points in 2020. The Arab vote alone is not significant enough to swing the election towards Trump even if they voted for Trump by Assad margins. Trump needs to find other places to gain.
Yes, Biden won MI by 3% in 2020. But 2020 was a D+4.5% environment. All the polling indicates a a tie or, at best (for Biden), a D+1% or D+2% environment. The whole state will likely move against Biden compared to 2020, and a swing in a small group like Arab-Americans could therefore make a difference