What to put in Supabase site url?

[SeriousLee20]

I'm developing a web app using Nuxt3 and Supabase. The project is using OAuth (Google/GitHub).
The project is running normally on the local host.

However, when I deploy it to Vercel, it becomes a problem to redirect back from the OAuth link when I set the site URL to any link other than http://localhost:3000/.
I tried to change the site URL with

• https://[project-name]-[id generated by vercel in login page]-[username].vercel.app/
• https://[project-name].vercel.app/

I also tried the URLs above with redirectTo option in supabase.auth.login function.

In the end, I still can't find out what should I put in the site URL box. Is there anything I'm missing out or understanding wrongly?