They pair very easily (no catchall method required), and work well with the standard zigbee switch DH. Just put the plug into pairing mode (put a pin/paperclip into the hole in the side to push and hold the reset button for a few seconds), search for new devices from the app, and it will show up as an Ikea Tradfri control outlet, and will automatically assign the zigbee switch DH to it.
Edit: for what it’s worth, the other devices known to work well as repeaters for Xiaomi/Aqara devices are Ikea Tradfri bulbs, x-bees, and these custom devices put together by a community member: https://community.smartthings.com/t/another-zigbee-repeater-solution-with-temperature-humidity-pressure-and-light-sensors/123815