Regarding submission: you can create a pull-request for yourself, inside the M5Stack repository, which adds your example and M5Stack engineers eventually will check it out.
@m5stack_ag G'day, Thanks for reply.
Any chance I could get a few technical tips please...
For example;
If I were to take the 3D antenna off, which solder points are which?
-- to use for, say, a tiny coax to an SMA mounted on PCB.
I can't tell from circuit diagram and I don't know if the Stamp is printed to indentify the points under the 3D.
A photo with pointers would be useful ;)
I doubt it will be for a long while as it is not be ratified yet. Once Matter becomes publicly available and we can use it with Micropython then may be we could get it by December. To be honest I have only just heard a bout matter as “On it’s way but not finalised”