I've been using MacOS for awhile and this is likewise my one true gripe. I've played around with amethyst and yabai and also find them just a little too shaky to rely on. I miss the rock solid nature of i3/bspwm. And trying to script my own functionality with Hammerspoon or BTT has been an exercise in frustration. I'll give Swish a shot with this recommendation.

However I'm not sure Swish solves the big benefit of i3/bspwm for me, which is the lightning-quick virtual desktop and "send to desktop" functionality of a tiling WM on linux. Having two apps open side by side is useful, but not quite as useful as having two apps open full screen on virtual desktops 1 and 2, and the switch between them being totally instantaneous.