It's very niche but Philharmonie de Paris has some brilliant visualized analysis of some classical music scores.

For example:

https://pad.philharmoniedeparis.fr/CMDA/CMDA100008800/defaul...

https://pad.philharmoniedeparis.fr/CMDA/CMDA100003900/defaul...

https://pad.philharmoniedeparis.fr/CMDA/CMDA100004800/defaul...

Sadly they don't present the full scores, only the beginning or some part. I wonder if there are other sites where you can find something similar.

Somewhat related is http://www.critique-musicale.com/ - another great site.