CTRL-F for "open source", no hits.
What a glaring omission. There are tons of open, freely licensed fonts: https://fontesk.com/license/ofl-gpl/
Iosevka is a fantastic open-source font that's fully customizable. I have replaced the fixed font on all of my devices and apps to a custom Iosevka build I made, and I don't think I'll ever turn back.