> (1) I always use m or M with superior dot (above the character rather

than below), as this keeps to the other nasal character (.n and .N). So
please add m/M with superior dot.

I should find a way to do that. Already on the Pali Extended keyboard.

> (2) How to get Pali capitals.

Hold down the shift key. E.g. Type - A

> (3) Please do a US keyboards: I'm sure many be grateful for it.

Not sure why you're not getting the dots below with the hash key. I think
the hash key is elsewhere on US keyboards. Not having a US keyboard makes
it difficult to test.