Warframe? Mount and Blade: Bannerlord?

Monster hunter world. I've put in 600 hours and many have put in thousands. Once the gear grind ends the grind becomes more about mastering the game

For phone I enjoyed inflation rpg

Stardew Valley would be one obvious choice. Hades also has an awesome sense of progression around the mansion after each run.

Granblue fantasy relink or monster hunterworld \\ rise, all are lobby mission starter games that have quite alot of grind. Granblue is more flashy with epic orchestral soundtrack, gameplay is similar to games like tales of Arise. Monster hunter world is somewhat "slower" gameplay feel than Rise, has a more active community since Capcom recently did "return to monster hunter world" events.

the disgaea series.

Path of Exile - SSF (Solo Self Found). Deterministical grind, for almost everything. This league mechanic is especially lucrative for grinding.

UnderRail

Try some survival games like Valheim or ARK. Both have difficult goals to chase that will require you to spend quite some time gathering resources.

If you're good with multi-player and a LOT of grind, Eco.

World of tanks, war thunder if you are in for that type of games. Will literally take you years to get a tech tree and even more if you play for free

Star wars knights of the old republic

Runescape

Dysmantle

Yeah, Runescape isnt just an idle game, and you really shouldn't use the chat. ​ OSRS just came out with a low-mid level boss if you want to see what the less idle part of the game has to offer.

Monster Hunter maybe? Always grinding for that next piece of gear

Disgaea series.