Here's one title that includes a hyphenated words. Also this includes a word that is sometimes capitalized in title case.
Aliens are coming in the not-too-distant future!
Or an article called:
AIP-040 Non-Fungible Token Standard
Is it the responsibility of the style guide to fully specific how title case works? If so, this question is for naught.
But if title case actually has some universal meaning then how do we apply that meaning to hyphenated words?