Kerning groups can do the trick for copying the kerning, but spacing-wise, I’ve had to do it manually so far which was a bit tedious. Franz replied to my question about a month ago on how to do that: Copying Kerning Pair Values? - #3 by franz
Definitely now having the issue of wanting to clone all upper case characters into lower cases and afraid I’ll have to manually enter all the spacing values (I’m making a caps only font). I’d also be interested in this feature 