I'm afraid not. I'm still only modding Oblivion, if at all these days, and know about modding Skyrim et al only peripherally.
But I do know the answer will be hard to find, if it is not further specified "what type" of assets is to be converted, as everything is done vastly differently depending on what type of asset it is.
Texturing has changed how normal and replacement maps work or are created, and also how it is applied onto a mesh in a NIF.
Models have changed the way how textures are applied and there's additional shaders for certain things, something Oblivion didn't have.
I don't know about collision in those games' NIFs. But it's not unlikely this also changed some way.
The rigging pose and how animations work has also changed, so direct 1:1 conversion of clothing, armor items or even body or creature parts also won't work, or not without first heavy modification in a modeling app.
What I'm now still lacking of all this, is knowledge of how it has to be in Skyrim/SSE. I may know almost everything about what to convert things from, but literally nothing about what to convert it into.
None that I know closer, I'm afraid.
This forced inactivity that's keeping me from finishing my projects for years also distanced me from the community a good deal. Almost all the ones I knew closer back then have by now either moved on or disappeared.
I may know a couple by name, who are good at porting from other games, some of them even making Skyrim mods from this, but I can't say I recall a lot who dedicated to porting from Oblivion to Skyrim, well apart from the people behind the big porting, or better "re-creating" now, projects everybody knows, like Skyblivion, Skywind, etc.
But I did say re-creating rather than just porting, because the mere use of converted original assets from one of their games in another is something Bethesda doesn't allow, and at least in the past was adamantly combatting, up to the point of shooting down entire websites for only documenting how said porting can be done or providing tools to do so.
Only if the asset is not from the game itself, or derived from one of the game's original assets, like completely created from scratch unique new assets from mods, conversion to another game can be allowed.
But again, I know none of them by name, or think they know mine.
Maybe the folks in the Drunken-Crafters-Inn group my know more: https://www.deviantart.com/drunken-crafters-inn/
Chakaru and Room207 are rather active in porting from other games, and I think some of them also mod for Skyrim/SSE. But it's of course a group for modding Oblivion, and they are mainly converting "from" other games "to" Oblivion instead, so... I don't know.
I'm a bit "out of it", one can say, for quite some time now due to my involuntary inactivity.