Hi. There's currently no way to use Adobe Fonts with the new Gutenberg system in WordPress 6.5. That is, unless you add a 3rd party page builder theme.

As I hear it, they're building an API for their new WP font manager, so work is needed on the Adobe end to plug Adobe Fonts in.

This is a new / forthcoming issue. They published the release candidate of WP 6.5 a week ago, and before that it was a beta for a while.

I was asked by Adobe staff to post this here as a reply to a forum question. At that time I was still trying to understand why the instructions that Adobe Fonts gives didn't work.

While this issue is unsolved, I recommend that you stick a notification on the install instructions page to let people know that these two products are incompatible for the time being.

This would save everyone a lot of grief, including your customer support staff :)