Some of them are outside the mathematical range, that just happened to be the one I picked.

Google has a lot of resources to do normalization, when IDNA in the URL bar became common they and other browser manufacturers had to put resources behind similar looking glyph attacks to make sure that you were actually on google.com and not on some site that was using a homoglyph attack.

https://blog.malwarebytes.com/101/2017/10/out-of-character-h...

This may explain why Google is able to discern these use cases.