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You may need to do skill work for awhile.
Retool your squat.
With the meniscus refixated you have less tolerance for deviations in technique.
You may have been able to buffer these deviations in the past, but you are no longer able to buffer it.
You are a different athlete now. Not good/bad just different.
In this type of situation you may need to retool some movement patterns. Doing alot of skill work and really dialing in the technique at lights weights will prove beneficial and set the stage for adding more weight if this is something that is safe for you to perform.
Does your doctor squat?
If not maybe you can get a second option from a doctor who does squat.
It makes a difference when your doctor does have s&c in their training. They understand why you want to perform certain movement patterns.