Laravel Nova not generating route for new tools

Yesterday I created two new Laravel nova tools with the relative artisan command (no errors in command output), but when I tried to visit the tool page from nova side menu, it results in 404 NOT FOUND (and no error is shown in browser console neither in storage/logs/laravel.log). Digging deeper, I noticed that nova was not generating routes for new tools anymore: i discovered it by running the artisan command route:list and noticing that the tool I made a week ago on the same project has its own route, but there wasn't any for the new one. In addition to this, I've now noticed that the older tool (that worked properly until yesterday), is not reflecting changes anymore, even if I rebuild it. Does anyone ever faced this kind of problem? Any tips would be very appreciated!