Oblivion Remastered is compatible with the Construction Set for mods of the original game
, by Thibaut
While the excitement surrounding the arrival of The Elder Scrolls IV: Oblivion Remastered was real, there were still some fears, particularly on the modding community.
Fortunately, budding modders were pleasantly surprised to discover that the Construction Set used on 2006's Oblivion is perfectly capable of handling the remaster's files. For the moment, the Unreal Engine 5 does not seem to be causing any compatibility problems for mods.
Bethesda has made it clear, however, that The Elder Scrolls IV: Oblivion Remastered does not officially support mods, so the publisher won't be providing any further tools or assistance in this area.
Source: reddit.com