Examples of websites using
IBM Plex Serif
(IBM Plex Serif is a serif font designed by Mike Abbink of Bold Monday. The font family consists of multiple styles, including regular, bold, italic, and bold italic, offering a range of options for designers and typographers)
with
Okomito
(Okomito is a sans-serif font designed by Hanken Design Co. The font family includes multiple weights and styles)