- The Disgaea series is hilarious, infinitely replayable, and allows you to pull off some very satisfying game-breaking maneuvers. Disgaea 1, 4, and 5 are considered the best in the series. Disgaea 7, the newest release, has good reviews on Steam too. If you want to pick just one, get Disgaea 5.

- Tiny Metal is inspired by Advance Wars and improves on many aspects of the game.

- Wargroove is also inspired by Advance Wars. It's very good, but a single level can sometimes take a long time to beat (45 mins to an hour). Comes with a scenario editor so you can design your own levels (or download other people's creations).

- Into the Breach is one of my favorite games. The design is simple with very few rules, but it lends itself to emergent behavior that can be a lot of fun to discover.

- Deckbuilders give me the same kind of satisfaction as turn-based strategy games. The current genre darling is Balatro, and its popularity is well deserved. One of the best games to come out in recent years. I've been recommending it to everybody.

- And of course, the Fire Emblem series is still alive and well. The games are 3D now, but the gameplay is still the same as it always was (with slight variations between versions). Fire Emblem: Three Houses might be my most played game ever. That said, Fire Emblem has never been as challenging as Advance Wars in my experience, so you might not enjoy it as much unless you play on higher difficulty levels. I play these games for the story, so I usually play on easier modes.

- EDIT: oh, how could I forget Triangle Strategy and Unicorn Overlord? I haven't played these yet, but they're well reviewed and come with some very interesting mechanics.

Hope there's something new in that list for you to enjoy :)