Yup, but it’s taking me a bit to figure out what exactly needs to be changed to enable the onboard SOC temperature sensor in the Xiao version. I’m just a community member not seeed staff 
Also, I’m a few days from submitting some PRs to the nrf-sdk, to enable more stuff for the Xiao version. I’m testing a new ws2812 driver I wrote for the high performance core for it.
There’s likely no reason I can’t add the seed boards into the main board tree and add it to the supported list in kconfig for the matter samples.