I invite you to watch that 49ers game again. I rewatched it last night and the problem isn't La'el and Tyron, they played great. Tyron didn't give not one of those 5 sacks, and he hasn't given up a sack all year, and La'el only got beat once, on that play that injured Bosa. The sacks came up the middle. Even Martin gave up one. The problem is Connor and Tyler.
I'm no GM so I'm not acting like I know how to run a team here. But since we will be short on money and a lot of FAs, I would move La'el to left guard, let Connor walk unless he take the minimum, if he takes the minimum he's a backup, move Steele to right tackle and let's try to find a replacement for Tyler in the draft or free agency while giving Matt a close look in training camp. Steele put in a lot of work in the off season to make that leap, maybe Matt can do the same. La'el already gave his blessing earlier in the year when he came back from suspension saying he's a natural at left guard. Steele played very well at right tackle when La'el was out.
But that said, yes we need to be looking for Tyron's replacement in this draft. FOR SURE the next draft since we will have a lot of FAs leaving and we need a good draft to replace them all.