Hi Scott! This is more a support question for Belkin, they do the Remo plug. But as far as I understand, it should just work. You may check in the app Eve (Settings > Thread network). You can check Thread functionality as well with this tool: the app Discovery on iOS (https://apps.apple.com/de/app/discovery-dns-sd-browser/id305441017) or the version for the Mac (https://apps.apple.com/de/app/discovery-dns-sd-browser/id1381004916?mt=12). In the app at _hap._udp. you will find the Thread devices, at _meshcop._udp. your Thread Border Router (HomePod mini and/or Apple TV 4K 2021).
In case this ain't work, please contact Belkin support. Best regards, Volker
Apr 19, 2022