Do you only need a payment gateway?

I'm in Europe and there is a lot more to accept payments here:

You need to ask the customer for their location and then calculate VAT and other tax details depending on where they are.

You need to ask for their address and send them an invoice.

You need to store all that data and create tax reports from it.

I have not started to sell digital goods yet, but I am planning to.

Any tips on payment providers who abstract all of that away?

I think the payment provider then has to be the one from whom the customer buys the service and your "customer" is the payment provider?

I'm surprised there is not a big player who handles this for all online merchants around the world already. It must be a giant business.