My ZBMINIL2 is lonely due to zigbee map ( I can't upload picture by some reason or I dont know how).
Due to sonoff only ZBMINIR2 is router.
I can't speak to those specifically but I see they are mains powered so usually that implies it's a repeater.
You can tell by running a ZigBee map app (via HPM) like the one from dandanache; it will show you the repeaters.
I use Tuya repeaters everywhere, they are releable and have a strong signal.
As noted, most mains powered devices are repeaters, so yours likely are as well. No idea if they are good/strong repeaters or not...
This as @dnickel notes, is a good way to see, w/default settings blue devices are repeaters:
