As of update 1.16.221 (at least for me others have had this problem since 1.16.100)
I've been running MC with the settings I have shown below and I'm running at 100% CPU usage and 64% GPU usage I've reset my whole machine and searched online and saw others are having the same problem but none have reported it to the bug tracker. it seems the game is using a lot of CPU usage when idle too because 24% of my CPU while idle is a lot. i have no idea why this is happening it just is. its really strange because for once I can run java edition with higher fps then bedrock. Also there is huge input lag but that seems to come with the high CPU usage.
I have a core i5 7gen running at 3.50 GZ
and my GPU is intel's HD graphics 620 (8gb VRAM)
With 16 gigs of ram, all really good specs to play mc]
Yes, I'm fine with people knowing this information
LINKS to people on reddit who seem to have the same problem: