I'd love a "Ghosts of Tamriel" game, set far beyond the time of Morrowind, Oblivion, and Skyrim. It would be set in a steampunk era in the same world, where magic is still a thing, potions are more chemistry than herbalism, and you have the steampunk tech to work with. The different lands of Tamriel could be traveled among freely, each one with a slightly different steampunk theme... One western, one urban, one agrarian/rural/wild.

KCDII

If you want medieval, oh, you are gonna get medieval.

For me it was Witcher 3 and the dlc. Love that game so much..

Totally biased, since I lived in half of my life in Skalitz. Have you considered KDC?

Keep an eye out for updates on Skywind, soon you'll be able to play Morrowind in Skyrim. They're excitingly close to finishing, after a long road.

BotW has significantly better open world exploration and puzzles but much weaker towns.

I don't know if it's quite in the same category but I'm playing baldur's gate 3 at the moment and really enjoying it. I'd definitely recommend that.

Tainted Grail: The Fall of Avalon

An indie game which has a lot of Skyrim vibes.

Though there are a lot of games with the same themes and openness, I have never found anything that really fills the feeling quite the same as a Bethesda game. Save one: Deus Ex. The original one.

Unfortunately Fallout: New Vegas is the only game I can think of that can top Skyrim. I know you wanted a newer game, but that's the best I can do.

Have you considered Cities Skylines II? It also scratches the same itch for me, and by that I mean that it has robust mod support and can be played forever without me ever getting bored of it.

https://store.steampowered.com/app/3849000/The_Lantern_of_the_Laughless_Saint/

Kingdom Come Deliverance 1 was great.

But it's a Medieval RPG, not fantasy. So you won't find elves or orcs or magic.

A lot of posts here with things that are thematically similar and open world.

I personally bounce between Skyrim and Fallout 4 a lot. I'd give 'A Storywealth' collection on nexus a play.

What platform are you gaming on?

I would suggest The legend of Zelda Breath of the Wild.

Even if you hate Shitendo (like I am) there are ways to play it on other platforms

I loved Skyrim, considering going back to that well soon. I'm on my 3rd playthrough of cyberpunk 2077, I've embarrassingly got 470 hours on that game. I feel like those 2 games are somewhat similar, 1st person open world, player choices have some effect on the game but not much, character customization is a lot of fun, side quests galore, lots of lore, tons of mods, etc.. cyberpunk had serious troubles when it first came out but at this point it's a solid game. I recommend giving it a try

Idk but you better tell me you find one!

I’m tried a lot of the games mentioned in the comment. Many are good, but none of them scratches that Skyrim itch.

Depends on what you actually want. If it's the first-person RPG experience, there's a handful such as Tainted Grail and Cyberpunk 2077. If it's using a slightly different system or closer to traditional RPG, either the Witcher or BG3 or Expedition 33.

But modding... I cannot find any other RPG that gets better if it is modded, as Skyrim -- and Morrowind and Oblivion -- pretty much designed to be modded.

I really liked Assassin's Creed Odyssey

Not the same, but a very fun game

I also like Ghost of Tsushima, but if anything it's even less like Skyrim

For some reason I can’t get into Bethesda games. I’ve tried numerous times but they aren’t for me. I guess I find open world rpgs to be really boring for some reason. Even though I like looter shooters/Diablo clones. Which is a similar genre but more focused on getting da loot.

Telling people what in particular you like about Skyrim is going to get you much better feedback as there are many, many games that are similar in some ways but not others.

I can give you older and with worse tech - Morrowind is better than Skyrim

Oblivion Remastered - basically Skyrim, start here IMO.

Kingdom Come Deliverance, 1 and 2 - exacly the same as Skyrim except super realistic and historically accurate.

Dragon's Dogma, 1 and 2 - faster paced dynamic combat with a big, vibrant world to explore, but without the finer details.

Dragon Age, Origins, 2 and 3 - More strategic combat and dialogue, less world detail.

Mount and Blade, Warband and Bannerlord - ok not that much like Skyrim but similar appeal. You go into battles with dozens of soldiers, command and fight alongside them, plenty of RPG elements and questing but is mainly a sandbox for you to figure out your own goals on your own.