Not OP, but I also have instant space switching enabled with yabai. Here is my yabairc and skhdrc.

yabairc - https://github.com/SxC97/dotfiles/blob/main/.yabairc

skhdrc - https://github.com/SxC97/dotfiles/blob/5db5e13f894f767722758...

If it's still not working, make sure SIP is disabled and the Scripting Addition is installed and loaded. Here's a link to the instructions as it's a little complicated: https://github.com/koekeishiya/yabai/wiki/Installing-yabai-(...