Game I can play while working from home?

I work a job all online from home. Normally I am super busy in the morning, but my day turns into “on-call” in the afternoon… giving me a good amount of free time to have a game on my second monitor.

Looking for a game I can play on my second monitor that has addicting progression and grind. I have been in a gaming drought recently and want something I can get addicted to again while passing time at work.

Open to any suggestions on PC!