How to monitor/manage VRAM used by game?

I’m actually working with a 8GB VRAM GPU on a project filling all the 8GB.
I know I have a lot of 4k textures that can be reduced to 2K or less but I would like to know where do those 8GB of data comes from.
I’m using the “stat memory” command but I can’t see anything related to VRAM. Is there another command that I don’t know?

Try perhaps:

stat TextureGroup

More counters here: Stat Commands | Unreal Engine Documentation

This just shows how much physical memory is used but I don’t know what is loaded to RAM or VRAM

RenderDoc statistics window will give the summary for a frame