Any suggestions for replacement pulley wheels? 11 speed gravel cassettes?
So far I'm pretty happy with my cheapo 12sp Sunshine 11-50 alloy cassette. It's super lightweight, considering the size and shifts mostly pretty smooth. I've seen the same one under a few different brand names, I think, incluidng Goldix. Be warned, though, the eGR will work with 50t, but it isn't the best option. The shifting suffers in the highest gears because the b-screw needs so much room to clear, but you also suffer in the lowest gears because if you shift too quickly the pulley wheel will actually strike the cassette.
I know you were asking for 11t options, but I only brought it up because I was surprised that such a dirt cheap cassette works so dang well.
Edit: I believe I have this one, in the 12sp 11-50 configuration. You may want to consider the 11-46 11sp configuration, or maybe see if you can find an 11-48t cassette somewhere.
https://www.aliexpress.us/item/3256805811005103.html