.

[curya]

.

[wdymThisIsntAvailable]

There's also no dozenal digits in Noto Sans which is also present in Noto Sans Symbols which is upsetting as someone who is interested in dozenal

[simoncozens]

We won't be including roman numerals or dozenal digits in Noto Sans LGC because they're already covered in Symbols. Noto Sans is not expected to be a single font to cover all codepoints, but instead it's part of the Noto system; you can always use the two fonts together as part of a font fallback stack. Otherwise there's simply no end to the codepoints we could add.

I don't think there are any pans to make serif versions of Roman numerals, no.

[moyogo]

Unicode 15.0.0 has the following paragraph in chapter 22:

For most purposes, it is preferable to compose the Roman numerals from sequences of the appropriate Latin letters. However, the uppercase and lowercase variants of the Roman numerals through 12, plus L, C, D, and M, have been encoded in the Number Forms block (U+2150..U+218F) for compatibility with East Asian standards. Unlike sequences of Latin letters, these symbols remain upright in vertical layout. Additionally, in certain locales, compact date formats use Roman numerals for the month, but may expect the use of a single character.

The Roman numerals characters are only recommended in specific cases and don't make much sense in a Latin-script context where Latin letters can be used.