https://www.milehighreport.com/2021/...ith-short-arms
If we use an eighth of an inch “fudge factor,” you can see that only six offensive tackles have made All Pro over the past six seasons with “below average” arm length. Those six are Taylor Lewan, Ryan Ramczyk, Joe Thomas, Joe Staley, Mitchell Schwartz and Donald Penn. You should note that none of those six have arms that are as short as Teven Jenkins (although Penn is close).
If you can overcome it in boxing and MMA you can definitely overcome it in the NFL. Note those are just the elite names at OT. I'm sure we could find solid/average OTs' with shorter arms, too.
Arm length matters; it is not dispositive.