Ten potential Democratic pickups in 2022? Let's see...
Pennsylvania
Wisconsin
Florida
Arizona
North Carolina
Georgia
Those are the only really obvious ones I see, and none of them are guaranteed. I guess there's Iowa and Ohio as well. Beyond that we're basically just naming random states.
AZ, FL, GA, IA, NC, PA, and WI. OH if Portman retires, is primaries out, or runs for Governor against a Democratic Governor. AK if Murkowski retires, is primaried out, or runs for Governor. IN/MO if an extremist wins the primary.