Hi,
Here is what I think functional ConTeXt code should look like:
%\enabletrackers[font*]
\definefontfeature
[burmese]
[script=mym2,mode=node,locl=yes,abvs=yes,blwf=yes,blws=yes]
% thats all the features the font has.
% there is some weirdness with the script (mym2 instead of mymr)
% an
Dear community,
honestly, I do know almost nothing about ConTeXt. My sincere apologies. The
answer https://tug.org/pipermail/lualatex-dev/2018-September/001681.html on
my request https://tug.org/pipermail/lualatex-dev/2018-August/001680.html
implies that this mailing list might be the right spot