I was struggling to find a word to describe Fetterman as he is today. I think “populist” might be it. And his stances are evidently genuine. Here he is at a pro-Israel rally, draped in an Israeli flag. Folks who are just playing games wouldn’t do that.
However, Fetterman probably still has all his socialist ideals. Time will tell if he moves more to the left or more to the right. Given how “different” Fetterman is, I wouldn’t bet much either way.