Is there anything I can do (like a font (or whatever) I can install) in order for these symbols to display properly?
o͘ O͘ ⁿ
á é í ó ó͘ ú ḿ ń Á É Í Ó Ó͘ Ú Ḿ Ń
à è ì ò ò͘ ù m̀ ǹ À È Ì Ò Ò͘ Ù M̀ Ǹ
â ê î ô ô͘ û m̂ n̂ Â Ê Î Ô Ô͘ Û M̂ N̂
ā ē ī ō ō͘ ū m̄ n̄ Ā Ē Ī Ō Ō͘ Ū M̄ N̄
a̍ e̍ i̍ o̍ o̍͘ u̍ m̍ n̍ A̍ E̍ I̍ O̍ O̍͘ U̍ M̍ N̍
ă ĕ ĭ ŏ ŏ͘ ŭ m̆ n̆ Ă Ĕ Ĭ Ŏ Ŏ͘ Ŭ M̆ N̆
\tracinglostchars=2
near the top of your document will warn you when you try to use a character that your font does not contain. – Davislor Dec 3 '20 at 0:50