Unless you're running Home Assistant and open source nodes. You can build a Matter+Thread node that works on a nrf52840 MCU, there are examples in the Nordic SDK. But then, why would you bother with Matter which is so bloated it doesn't even fit in flash properly? The only example that works on 52840 requires external flash to hold the B partition for OTA updates :)
So I'm using ESPHome for everything that could be wall powered and BTHome (with those same nrf52840 chips, you can buy boards for like $2 on Aliexpress) for everything that needs to run on battery.
So I'm using ESPHome for everything that could be wall powered and BTHome (with those same nrf52840 chips, you can buy boards for like $2 on Aliexpress) for everything that needs to run on battery.