As others have pointed out, the extensions are likely not (officially) compatible with the new version of GNOME yet. Which extensions are you having trouble with?
There are a couple of extensions that are available for installation through dnf for which Fedora takes care of making them compatible at the same time at which they make available a new version of GNOME. Caffeine and Dash To Panel are two examples. For a full-ish list, try dnf search gnome-shell-extension.
As others have pointed out, the extensions are likely not (officially) compatible with the new version of GNOME yet. Which extensions are you having trouble with?
There are a couple of extensions that are available for installation through dnf for which Fedora takes care of making them compatible at the same time at which they make available a new version of GNOME. Caffeine and Dash To Panel are two examples. For a full-ish list, try
dnf search gnome-shell-extension.Alternatively you can also try manually editing the extension’s metadata to “make it compatible”. Your mileage may vary with this approach, but it worked fine for Net Speed Simplified, for example.