Gateway versus acquirer in the UAE
Local gateways and payment facilitators can get you a checkout quickly, but behind each one sits an acquiring bank or licensed payment institution that sets the sector rules. If your activity is outside that acquirer's appetite, changing gateway on the same acquirer will not help.
UAE retail payment services are regulated by the Central Bank of the UAE, and the acquirer's terms usually require settlement into a UAE account in the company's name, often in AED, with USD or other currencies available at some providers.