Can I adapt old lenses to canon rf?

Here is what the site says about that.

From Canon EOS 850D: Adapting lenses: Every EF and EF-S lens adapts to Canon RF mirrorless bodies without losing anything.

From Canon EOS 90D: Adapting lenses: Every EF and EF-S lens adapts to Canon RF mirrorless bodies without losing anything.

Quoted from this site's pages.