Shimano Deore cassette CS-M4100 10x 42-11 works great
Some posts were confusing and I was not very sure will it work or not. Now I can confirm, it works great!
I have installed the Shimano Deore CS-M4100 10x to a Cannondale Gravel bike Topstone 2 with the original full GRX 400 equipment.
The B-screw must be adjusted to the maximum distance. Then shifting is smooth as before.
Only one point, that has to be mentioned. My chain is too short with 112 links, i.e. the largest 46 front chain ring does not work with the largest 42t ring on the cassette. This combination shouldn't be chosen, of course, but when it is done accidentally the wheel can block.
Maybe I will add 2 or 4 more links, sometimes.