At the time of writing a lot of this might be more recent, but for quite some time codepoints.net had not been updated with code point information newer Unicode releases.
Basically it was stuck at Unicode version 8.0 with some 120k glyphs. At the time of writing Unicode version 15.0 is in beta and the difference between 15.0 and 8.0 is some 24k glyphs.
So I had a quick twitter chat with the author and jotted down the links in this blog post so I won’t forget them.
There I learned it was open source (I think it is the only Unicode codepoint site that is).
Here it goes:
The Wiert Corner - irregular stream of stuff 