Pages build hanging

I’m testing moving a Gatsby site over from Netlify to Pages. However, the build has been running for 15 minutes now. It’s obvious to me that the build has encountered an issue. I’m going to trigger a re-build however wanted to know if there’s a way to discover a build ID to give as feedback for the Cloudflare team to figure out what might have happened seeing as this is a Beta product?

Thanks!