Search for "REDmod" in the store (it's free) and add it to your library.
Move the contents of the archive into the mods folder. A valid REDmod folder should contain a info.json file. 3. Activate the Feature RE_Ionian_Corps_v031_-_Red_Mod.7z
If the mod doesn't appear, try deleting the modded folder inside Cyberpunk 2077/r6/cache to force a refresh. Search for "REDmod" in the store (it's free)