Skyrim Special Edition on Game Pass can be modded, but is severely limited
PC Performance Tools
Last week Microsoft finalized their massive $7.5 billion acquisition of Zenimax Media - the parent company of many big game studios including Bethesda - which meant many more Bethesda games had become available on Xbox Game Pass. However, one concern that was raised included mod support, and it seems like Skyrim Special Edition does include full support for mods, but is actually severely limited by one important factor.
When a game is purchased either through the Microsoft Store or Xbox Game Pass for PC, the files are installed into read-only directories which makes them impossible to access and therefore unable to be modded.