I've worked for multiple major cloud providers and I assure you that launching the dependency chain to get most cloud services in production for 1 region takes

I've worked for multiple major cloud providers and I assure you that launching the dependency chain to get most cloud services in production for 1 region takes 6 months minimum (they have entire teams dedicated to launching regions). That is after building the datacenter (years) and launching the main database services (which require custom server hardware as I previously mentioned) that power most of the main cloud services. Google uses spanner, AWS uses dynamodb, and Azure uses Cosmodb which are all different database systems and thus they are all completely incompatible.