Medial or lateral meniscus? How did you do it?
I have torn the medial meniscus in both knees. One has been repaired. the other is still awaiting repair along with my ACL for the last 21 years.
The left one isn't that bad. Doesn't give me any issues as long as I don't go crazy with planting and turning ect...
The right one I tore slightly training at a pro wrestling school. Then a week later I tried to be cute and tore it wayyy worse. It flipped up and lodged in my knee joint. Excruciating pain. My quad atrophied from 28" to 25" while I was waiting 5-6 weeks for surgery because with a traumatic knee injury the brain basically shuts off the quad muscle to try and avoid further damage.
If the meniscus is torn, when it happened you should have felt maybe a pop and it should have felt (in an over exaggerated way) like your leg was about to flip out to the side.
How is your knee if you stand with your feet about a foot apart and squat as deep as you can (just body weight). In my experience with both knees, on a fresh tear when I do this motion about 3/4 of the way down the knee will slip slightly out of place on the tear. its pretty scary to feel. Then when you stand back up you might have trouble straightening your leg as it may stick or be caught. I have actually had to smack the knee cap back to pop my leg back straight. That only happened twice with the first tear like 20 years ago.
If the injury is fresh I would imagine it would be fucked up when you try to squat? If it really is torn and isn't bothering you during lifting then obviously it is very slight. My biggest concern is that while squatting or dead you will be going extra hard for a max effort lift and injure it WAY worse. Under the kind of stress like this especially the squat...its very possible you could completely blow out your entire knee. Imagine going for max effort and being all the way in the hole and your tiny tear giving way to a major tear. That isn't so bad...its a meniscus. Even a major tear (even if its painful) can be fixed and you have a 6 week recovery. HOWEVER.... if it tears worse the knee will slip...if it slipps with 400, 500, 600, or whatever on your back....that slip is going to turn into a complete disaster....meniscus, ACL, PCL, likely MCL.... you may never squat again after that bro.
I am absolutely not trying to be a doom sayer or a bum you out. Just trying to give you the perspective from someone with this injury on both knees. BTW...when I turned the 2nd minor tear into a major issue there was no weight, all I did was push off with my foot.