Unable to figure out automatic resizing in split window mode

Hello everyone.

I configured a window to snap to the left/right half depending on the gesture direction. However, resizing one doesn't resize the other and I am unable to get that automatic resizing to work for any of the actions except the native macos one. But this option is undesirable as it makes the windows go fullscreen.

Basically I am looking for the ability to resize two windows that are tiled next to each other at the same time by click/dragging on their shared border. Currently I have to resize one then the other to fill the rest of the space. Found this feature request from 2019 but no replies.

Any suggestions?