I’ve found a few fonts that have the smaller u’s, e’s and o’s with lines or dots underneath them (like PLORE) - anyone know of fonts that have u with the line on top?
If you are referring to the diacritical mark called a macron, most—probably all OTF—Latin alphabets contain them. The ū character is Unicode U+0168 and character code 363. Here are a few samples:
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