How to enable payment acceptance on the site?

Question

Payment systems

There is a site where you need to connect a payment button so that you can accept a visa and mastercard, the currency is only $, so that people can pay both from Europe and from the USA, etc.
What do you advise? There is a legal entity, I wanted Paypal, but they don’t work with Ukraine. The size of commissions does not play a special role, the main thing is a reliable and proven unit
ps Even the option of invoicing by mail will suit

Answer 1

In this case, the most logical would be an offshore company and through it there is already an agreement with any company in Europe providing ecom services in dollars.

Answer 2

Just in case, I'll throw a link - Gumroad.com
Maybe it will help))