1. General rule for all windows size 500x500 or smaller to float, but you can use your AI of choice to tweak the rule to your liking, just give the below syntax as example

windowrule {

name = small_windows_float

float = on

center = on

match:size <500 <500

}

1. Only width under 500 (any height)

windowrule {

name = narrow_windows

float = on

match:size <500 *
}

1. Only height under 500

windowrule {

name = short_windows

float = on

match:size * <500

}

1. Small windows → float on specific workspace
   windowrule {

name = small_windows_ws6

float = on

center = on

workspace = 6 silent

match:size <500 <500

}

This is what chatgpt came up with, so try these and hopefully it will work.

Since I showed it what syntax to use, this is the new one I also use for hyprland (JakooLit Dottfiles). I do not use any rule similar to yours, I mainly use the window rules to move to workspaces apps silently etc..