Cu3PO42 parent
I have the same experience with various Lenovo laptops running Windows. However, whatever Apple does on MacBooks works. I can close the lid, slide it into my backpack on Friday and open it on Monday with virtually the same battery level.
You can set it to "non-Windows" (aka real) standby in the BIOS settings.
If you can't find it in settings, this might help: https://www.reddit.com/r/Lenovo/comments/zq3tc5/how_to_disab...