Sadly people recommend OBS for regular screen capture on Wayland, after X11-based capture apps like SimpleScreenRecorder no longer work on Wayland. And OBS isn't very good at screen recording, and even cropping the recording by dragging a specific region, then shrinking the output file size to this region, cannot be done easily (alt-dragging the bounding box followed by "Resize output (source size)" picks the uncropped source size, and the "Crop/Pad" filter doesn't allow dragging a screen region).

In fact the issue was closed without understanding what the reporter was asking: https://github.com/obsproject/obs-studio/issues/8822