It is not possible to change cursor shape in WASM Qt 6.9.0.

Precompiled version: https://hyperborg.com/bugreport/cursor/v6.9.0/cpnode.html
Source code: https://hyperborg.com/bugreport/cursor/v6.9.0/main.cpp

Reproduce: run the WASM application from the link above. When the "Type some text here" text appears, click on the TextEdit area with the right mouse button. It will call the showContextMenu() function, that adds the "setting cursor to OpenHand" text, but the shape of the cursor does not change, as would expected after the setCursor(Qt:OpenHandCursor) call.

I will cross-check with Qt 6.8.2 also. I will update my findings when that compilation is ready.