Unity multiple instances

Hello,
I just noticed (accidentally) that Unity has multiple instances in memory. Check the screenshot.
When I open my project, it has only one instance, but during the work, I see some new Unity instances appear.
This happens on Unity 2022.1 and 2022.2.
Had no time to check on 2021.3
If this is normal then ok.
But after some time all these instances are about 8-9 GB RAM, well, isn’t too much?

Platform:
Apple Studio M1 Max with 32 GB RAM.

It’s probably normal. Unity spools up a number of threads for certain operations.

I think a dev once mentioned that on Windows at least dozen threads are spooled upon opening the Unity editor.

Not sure how things work on Apple.