I'm not positive if I have the N version, but I do not have any of the games or 3rd party applications loaded, so I'm guessing it is the N version
This is what comes up in the System About page
Edition Windows 11 Pro
Version 22H2
Installed on 8/31/2023
OS build 22621.4317
Experience Windows Feature Experience Pack 1000.22700.1041.0
This does NOT appear to be an N version.
When I try installing it from the command line I get
Windows update could not be installed because of error 2149842967 "" (Command line: ""C:\Windows\system32\wusa.exe" "C:\Users\DeskPC\Downloads\Windows_MediaFeaturePack_x64_1903_V1.msu" ")
1903 is for Windows 10, and the error indicates a version mismatch, so this makes sense. It appears that there is no longer a stand-alone download for the feature pack for Windows 11, as you've found out.
I don't think there would be a memory problem on your system, but you could monitor the Task manager while attempting to add the feature and see if anything unusual is happening.
In Settings | System | Optional Features | Scroll to bottom | More Windows Features, are Media Features and Windows Media Player (legacy) fully unchecked, partially checked, or fully checked? If it is checked or partially checked, you could try unchecking to remove, then reboot, and then check to re-add. On the other hand if most things are working properly for you maybe best to leave it alone and not risk making it worse.