Hi There!
It does sound like the laser is failing.
I recommend to replace the whole laser deck! So not the drive or the laser only. But just the laser deck.
There are more models available for the PS5. The most easiest thing to do, is to open up your PS5 and get the drive out. Check the model and order the one you need!
Then you are sure that you do have the right one.
And otherwise, you can always share some pictures with us :)!
Good luck!