Are google charts WCAG compliant?

Exploring them using Windows Narrator I would say not completely, because the screen reader reads a lot of unnecessary data before going through the table, but I'm new to WCAG and accessibility and I can hardly imagine something distributed by Google not being accessible...

Also, I noticed some charts not being read sometimes, like on this page: https://developers.google.com/chart/interactive/docs/gallery/barchart

Does anybody know if they are WCAG compliant? Can you explain to me why they are or why they are not?