Have you tried the milsims like Hell Let Loose, Squad or the Arma series?

They definitely play differently, but once you get into the groove I find them more rewarding.

Look Mum no Computer - It’s a truly crazy game described as a Twin-stick shooter ARPG, and I guess that’s right, but the coolest thing is that the music is controlled by your own gameplay and equipment, the devs even included an in-gane synthesizer.

Reminds me of the old Spectrum games from bedroom programmers.

Rogue Trader, it’s quite a new game, but it has a Steam Deck mode and runs quite reasonably for a turn based combat game, really enjoying it.