Very slow upload speeds from serverless workers

I'm uploading files to Supabase from within the serverless workers and I noticed the process is extremly slow. I understand there's some latency because most workers I'm getting are in Europe and my Supabase instance is on US east, but still, almost 20 seconds to upload a 8MB file is bad.
I've check it's not a Supabase issue as I'm based in Europe and my upload speeds are just fine.