I believe this means that the Junicode font has been updated to the latest version, which is 2.206.
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UniversalLanguageSelector/+/966445
But I just downloaded the extension today and the Junicode font.ini file says 'version=1.002'.
I am using this font with a transcription of a Latin manuscript and it definitely is not providing the characters from version 2.206.
I have the latest version of the font installed on my local machine and if I disable the extension, it loads the font from my machine and looks exactly how I would expect it to look. But when I re-enable the extension, it uses an older version of the font.
I'm not sure if there is something else I need to do here or if this has something to do with the extension itself.