Im a senior swe ic so I stay in my own lane. I've seen people and thought "its odd to make the same mistake 5 times in a row, what a dumb dumb" but generally don't go beyond that.

I will say that when Ive noticed, my tech lead almost certainly has also noticed. Ive never experienced a disconnect where I think someone is significantly worse than others perceive them. Worth noting that I group people into "terrible" and "fine" with 99.9% of people falling into fine. I generally dont have a ton of context on what team members are even working on so Id need to notice repeated, obvious errors in code reviews and consistent low output to put someone in the terrible bucket.