It's September 14 here, and Unicode 14 should be released.
I'm aware that all the fonts in this repo have already contains three new characters for the script, but looks like only BALINESE PANTI LANTANG and PAMADA LANTANG that are already mapped to the allocated codepoints even before the release of Unicode 14, but not LETTER ARCHAIC JNYA? The glyph is also inaccessible when I tried to type it, and when I inspected the OpenType feature code, uni1B1A.nya is nowhere to be seen, so it confirms the inaccessibility.
[EDIT] It turns out only Vimala that mapped PANTI LANTANG and PAMADA LANTANG.
So, yeah, please consider to map the new characters to their codepoints for all the fonts.
Thank you.