I don't know if he reinjured the knee...I think the knee was never able to be repaired and he's done being an NFL player. It just sucks that you could probably have said the same thing almost 3 calendar years ago right after that significant knee injury in a late season practice (those are almost never game speed/full contact/full speed practices), yet he's been cashing checks from that $100+M extension ever since. Regular season game speed reps is a whole different ballgame than participating in training camp drills, and how you're able to recover from that is paramount to being a NFL player. By all accounts the initial ACL injury he suffered in late 2020 was repaired by the first surgery, but there's been persistent swelling an other issues that have led to 3 followup surgeries that don't seem to be capable of correcting the problem. Sometimes a big guy's body isn't as willing to continue playing as the guy's mind is, and unfortunately that appears to be the case with #69.
If your starting LT can't be counted on to suit up and play on regular rest the week after playing a season opener in September on arguably the softest playing surface in the NFL and not suffering any obvious injury during that game, and he's now about to miss his 3rd straight game, he's not your starting LT anymore. I don't think there are any good options for the front office to do with him besides toss him back on IR for the rest of this season and then cut him in the offseason. Bakh has been willing to restructure that huge initial contract extension on almost a yearly basis so it hasn't been a salary cap nightmare, but part of that willingness is likely due to finding out ways to earn as much as he can before he moves into a TV commentary or podcast role...truth is his career appears to have ended in 2020, and it's a shame this has dragged on this long primarily because the timing of that injury couldn't have come at a worse time for the Packers in terms of both 2020-21 Super Bowl aspirations and longterm salary cap management purposes.