BuzzPCSOS mhm, OK. it's 3 month old Laptop. So I think it will have nothing to do with keyboard and a mouse is not available.
It has 2 inbuild SSDs. I don't know if there is a way to "send them to sleep".
And a 3 month old Laptop should have a battery with better health as 60%.
So the only think from your suggestions are the SSDs I need to check. But I think they will alos be OK, because if I boot the windows drive, suspend will work fine. Only Linux has the problem