[MikeBattaglia]

Unrelated rant: The Unicode people have missed a lot more than that. There are an enormous amount of, for instance, musical accidentals that are missing, including ones that have been in use for at least a hundred years, such as the half flats or half sharps in e.g. Arabic or Turkish music, which are used by probably hundreds of millions of people in the Middle East. (They do have a symbol called "half sharp" and "half flat", but it isn't the same symbol.)

But at least they have the multiocular O, I guess.

[kens]

If there's something missing from Unicode, you can propose it and there's a good chance they will add it to Unicode. Source: I got 7 characters added to Unicode.

[maw]

Now I'm curious: which ones?

[BeFlatXIII]

We also have a poop emoji and no Tengwar

[WorldMaker]

Tengwar likely has to wait for the JRR Tolkien estate to release it to the public domain (CC0, for instance) or for the copyrights to expire on their own in a century or so.

(Same with Klingon glyphs and others.)

Such uses are probably fair use, but the Unicode consortium seems hesitant to test "probably" versus reality, especially since they would not see the brunt of the consequences but font authors and others might.