I hear Enshrouded is pretty good for an Early Access game. I don't support EA, any EA, company or label, so I don't know. Black Skylands looks rads, Satisfactory reached 1.0 and while I don't have plans on playing it because I have Factorio instead and I'm not made a money, if you like more base building focused games like me and have copious amounts of autism unlikemeiswear you'll probably get a kick out of it, technically Open World. Void Crew I hear is damn neat for a multiplayer focuses space game, Everspace 2 for a singleplayer focused space game, I can't not mention Starsector for
obvious reasons. If you can stomach jank games then maybe Caribbean Legend would be good for you. On the actually half decent Dicksword I harbor myself in and pollute with my fuckery I made a list and reviewed various Roguelike/Roguelites that are very much Open World as well, could probably get them for you sometime if it's not deleted...again. Not exactly top tier in the graphics department but that's never the point of them. Matchless Kung-Fu (hey hey people) is very much Chinese jank but is pretty damn unique, its open world is made specifically by the player, when they from randomly generated pieces that you can earn in various ways to expand the map to quite nicely sized proportions. Again, jank as hell and quite autistic but fun. There's those Ghost Recon games that are so much better (I.E. actually good) when modded. I Am Your Beast, a game I've been watching for a while since I like the dev, or at least his games like Space Warlord Organ Trading Simulator (hey hey pe-) and the El Paso games, came out recently so look into that. I got into Moonring recently and it's pretty neat (inspired by classic Ultima) and it's free. It's pretty difficult so be warned. I'm trying not to..."display my powerlevel" as it were when it comes to game suggestions since I'd have to whip out
it again. There's classics like Sleeping Dogs, Mad Max, Red Faction, Dying Light,
Kingdom Come, S.T.A.L.K.E.R, The Saboteur, The Getaway, Rain World, Outward, yada yada I could go on, but Open World can come with varying degrees and I'm trying to stick to more well known games. Smaller tends to be better as it's easier to flesh the map out, so if you're looking for big ass open world games be prepared for it to be a snorefest.
Itch.io is your friend too if you...ignore some of the obvious trash.