I had to look it up because I don't have a newer phone, so I don't have that service app, but according to google it's part of their privacy, machine learning and AI stuff
https://security.googleblog.com/2021/09/introducing-androids-private-compute.html?m=1
Not sure what it means if that app has high battery drain though, could be legitimate uses, could not be. I don't know any further than identifying what the service app does.