I initially tried to post my component as well but got lost trying to figure out how to do it in Github and gave up.
But what do you mean by “purely surface mount”? Forgive me but I’m still learning some things here. Do you mean you mount your XIAO by pressing it onto surface mount pads ON the PCB instead of using the pin headers poking THROUGH the PCB? That seems like a lot more trouble than simply soldering the pins in.