Starship has launched today and hasn't finished everything it needs to even proof that it works reliable. For a Datacenter you need to put it higher than low orbit.

After that, you will need to start to even develoop server racks full of GPUs for space. You literlay need to engineere from scratch a cooling system which will be a few hundred square feed big. You need to be able to transfer massive amount of energy reliable from a small GPU rack to all of this area.

Than you need to send a few thousand of these constalations up there. Every single micrometeroid, sun storm, broken component means loosing a whole rack immediadlty.

Then you need to actually verify that you can send up all of that infrastructure in space and keep it alive there.

Then you have to assume a certain amount of lifetime which will be a lot shorter than on earth and you can't sell it of. These resources are gone.

To all of this cost, you will have to add latency, data syncronisation between racks has to be complelty engineered from scratch too. We talk about 100 of gigabits between these small constelations.

In the same timespan with a lot less money, you could already build a normal datacenter somewhere on the aquator or just as south in texas as possible. You can service it, you can upgrade it, no issues.