I was told Breath of the Wild and Crimson Desert have a similar vibe, but I'm not sure as I've not played them.

Star Wars Fallen Order and the sequel Survivor. Even if you don’t like star wars you’ll enjoy the game and gameplay if you enjoy assassins creed.

Edit:

Also the Mad Max game from 2015

I don't know why I like the Assassin's Creed games so much. They've been getting progressively worse for like 10 plus years now but I still like them. I even liked the Viking one, well I tried to. Haven't tried the newest couple of ones though. Mirage doesn't look very appealing maybe when it gets really cheap.

Certainly nothing really scratches the same itch exactly. There are a few games that almost do though that might appeal to you. The Shadow of Mordor games were kind of similar, not quite but in the ballpark. Even if they do offend me horribly as a fan of the lore. Far Cry 3 also came close though in a wildly different manner. Thats the only Far Cry game I've played but maybe thay would be a good place to look.

Far Cry 4

every assassins creed game is basically identical, so pick any from that series

A lot of people are going to probably suggest Stardew Vally to you, as it’s the 500lb gorilla of cozy games, but for me hands down my favourite cozy game is Spiritfarer. It’s got quite a bit of exploration and bit resource management, but the real draw is the story line I’ll try not to spoil it but it takes place in a sort of limbo afterlife and your job is to help your friends move on to the next plane.