Jokes aside: Looks like some CSS is missing/broken.
Did you run php filament:assets or php filament:upgrade ?
Did you check DevTools for errors?
Can you share php artisan about --only=filament output?
People got external APIs working via the Sushi package from Caleb. We can't give any support for v4 in the current state. The docs are next to the code in the vendor folders but may not be 100% up to date