Same problem arise when Pop_OS! updated the to Kernel 6.8.x. My laptop (T14s Gen1) do not woke up after suspend. And if it does, there's no video... Have to go back to good-old kernel 5.19.0-50-generic to get suspend working again.

/etc/systemd/system/systemd-suspend.service.requires is not present in my system either.

I relay on suspend for my day to day work... so it's kind of a problem for me not having it working.