While initial setup does enable fedora-third-party it doesn't "refresh" it which means that the repositories it is suppose to enable are not enabled (meaning that this switch has no effect)
Demonstrated here: https://youtu.be/UA2hRtK_mKM
This can be worked around by running "fedora-third-party refresh" in a terminal after toggling the switch on.
On dark themes including Adwaita-dark, the text is very hard to read because of hard coded black text on the tour app.
I know this is technically a theming issues, but given that the text is hard coded, this is not something a theme developer could fix. I know about stopthemingmy.app, but there's a lot of distributions that ignore this and will ship GNOME Tour with a broken theme, or may not ship GNOME Tour at all because of this issue.