Find an opensource font that supports Unicode Regional Indicator Symbols (https://en.wikipedia.org/wiki/Regional_indicator_symbol https://en.wikipedia.org/wiki/

Find an opensource font that supports Unicode Regional Indicator Symbols (https://en.wikipedia.org/wiki/Regional_indicator_symbol https://en.wikipedia.org/wiki/Regional_indicator_symbol). Google led me to https://www.babelstone.co.uk/Fonts/Flags.html https://www.babelstone.co.uk/Fonts/Flags.html. That’s SIL-licensed. There almost certainly are other fonts with liberal licenses.