I run Ubuntu and suspend is pretty much a nightmare to the point I just gave up pretending it exists. These are Dell computers sold with supposed Ubuntu support. Close the lid and put it in a backpack is inevitably an invitation for a hot laptop or empty battery when you pull it out a few hours later (for the record: Windows isn't any better at this in my experience so WSL never solved that problem either).
Previous laptops (all ThinkPads) used to be able to get everything all to work (debian) but it did take effort and finding the correct resources. Unfortunately all the old documentation about this stuff is pre-systemd and UFI and it's not exactly straightforward anymore.
Google "Dell suspend issues". It's just their computers, it doesn't work any better on Windows. My wife has had 2 Dell laptops now, neither suspended properly ever (and she only runs Windows). According to the internet, this is a Dell problem. One of her laptops also had the Wifi card break within 4 hours of use, brand new. But she likes the "design" and is stubborn.
Google harder. It's a general Windows problem. Microsoft can't even get it to work on their own Surface devices. Show me a Windows laptop that suspends properly and I'll show you a liar.
Well there you go. Meanwhile Linux suspend does work more often than not in my experience. I've had a ThinkPad, Acer and MSI laptop with working suspend on Linux.
Previous laptops (all ThinkPads) used to be able to get everything all to work (debian) but it did take effort and finding the correct resources. Unfortunately all the old documentation about this stuff is pre-systemd and UFI and it's not exactly straightforward anymore.