You must set the WLR_NO_HARDWARE_CURSORS=1 environmental variable, see here: FAQ · WayfireWM/wayfire Wiki · GitHub
You can try setting it in ~/.profile as suggested in this post:
Edit the file:
micro ~/.profile
Add this line:
export WLR_NO_HARDWARE_CURSORS=1
Save and exit, reboot.
If that doesn’t work, you’ll have to set up a wrapper script for launching Wayfire as described in the Greetd wiki: index - man.sr.ht