I hear what you're saying, but then I look at the Chiefs in 2021. They drafted Humphrey in the 2nd round and Trey Smith (RG) in the 5th round and both started from Day 1 despite the Chiefs having just gone to the SB and having an All-World QB they wanted to protect. I'm sure there was an OL like McGovern who by all accounts should have started over Humphrey, but they took the chance. And Torrence is a 2nd year RG, not a rookie like Smith.
And another thing to consider is that, while McGovern has more professional experience, Van Pran has spent the last 8 years playing only center, and the last 3 years on the premier college football program that finished 1st, 1st and 5th in the nation, often times going up against future NFL players. McGovern OTOH hasn't played center since his sophomore season in college and 1 game as a junior.
Now I agree that Van Pran likely won't win the starting job because I don't see the Bills taking a chance like the Chiefs did. But you never know.