[pveierland]

The Noto fonts have great coverage: https://notofonts.github.io/overview/

[infinita740]

Pretty cool vizualisation.

There is also GNU unifont [1] "The original intent of Unifont was to offer a simple font format with wide Unicode coverage to render something meaningful for each Unicode code point"

[1] https://unifoundry.com/unifont/index.html