I had a similar issue in Bug 2251508, and this was fixed after an update.  However, after a system update this evening, I am getting SELinux errors again.  Fortunately this time the suggested policy works as a workaround, which it hadn't before.

Below is the SELinux Alert:

--------

SELinux is preventing systemd-sleep from setattr access on the file /sys/firmware/efi/efivars/HibernateLocation-8cf2644b-4b0b-428f-9387-6d876050dc67.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that systemd-sleep should be allowed setattr access on the HibernateLocation-8cf2644b-4b0b-428f-9387-6d876050dc67 file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'systemd-sleep' --raw | audit2allow -M my-systemdsleep
# semodule -X 300 -i my-systemdsleep.pp

Additional Information:
Source Context                system_u:system_r:systemd_sleep_t:s0
Target Context                system_u:object_r:efivarfs_t:s0
Target Objects                /sys/firmware/efi/efivars/HibernateLocation-
                              8cf2644b-4b0b-428f-9387-6d876050dc67 [ file ]
Source                        systemd-sleep
Source Path                   systemd-sleep
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-39.3-1.fc39.noarch
Local Policy RPM              selinux-policy-targeted-39.3-1.fc39.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain 6.6.7-200.fc39.x86_64
                              #1 SMP PREEMPT_DYNAMIC Wed Dec 13 21:43:37 UTC
                              2023 x86_64
Alert Count                   1
First Seen                    2023-12-23 01:07:05 EST
Last Seen                     2023-12-23 01:07:05 EST
Local ID                      28b7603c-7372-42bc-a5e7-89716134d7dc

Raw Audit Messages
type=AVC msg=audit(1703311625.363:336): avc:  denied  { setattr } for  pid=3817 comm="systemd-sleep" path="/sys/firmware/efi/efivars/HibernateLocation-8cf2644b-4b0b-428f-9387-6d876050dc67" dev="efivarfs" ino=510 scontext=system_u:system_r:systemd_sleep_t:s0 tcontext=system_u:object_r:efivarfs_t:s0 tclass=file permissive=0


Hash: systemd-sleep,systemd_sleep_t,efivarfs_t,file,setattr


Reproducible: Always

Steps to Reproduce:
Try to put computer to sleep.
Actual Results:  
Computer doesn't sleeps but generates an SELinux warning.

Expected Results:  
Computer should sleep.