ublock may be able to help, perhaps something like
##*:style(cursor: auto !important)
Try https://dmnsgn.me/blog/from-glsl-to-wgsl-the-future-of-shade...
Looks like that one changes the pointer with javascript. I guess the only options are to not permit Javascript which breaks the site or use Reader View. Cntrl+Alt+R in Firefox.
Ouch, that is awful.