The nerd font is not correctly displayed.
The nerd font in the webpage is not correctly displayed with all font settings (sans, sans-serif and mono) setted to nerd font.
Webpage: https://starship.rs/config/#battery
Opaite Mbohovái (1)
I don't know which font those characters (0F00BE: \udb80\udcbe) include as this seems to be in the Supplementary Private Use Area-A.
You may see text labels or little boxes with the hex code of the character if you do not have a font installed that covers this Unicode range or the font that is used doesn't cover this Unicode range or if you block downloadable fonts or if you do not allow pages to choose their own fonts.