I spoke to a representative of theirs when I set up a business account with them. I was told for DOP, I need to call them to book a transfer. Their rates to other places were not competitive compared to other services when I looked and I have not bother to try again.Their website does only show about 30 or so countries you can send money from, and well over 100 you can send money to. The DR is not in the "from" list. I would have to assume the app would show the same. BTW, XE also does not list the DR as a country you can send from...only the US and Canada in North America, and none in Central/South America or the Caribbean region.
I am going go out on a limb and guess that the FROM and TO countries are based on bilateral agreements between those countries AND the operational decisions of each remittance company. For example, if you were to use the Western Union website in India, the list of TO countries changes a lot compared to what you would find on the WU website in the US. The DR version does not even tell you which countries you can send, just points you to agent locations. The list Wise has as TO countries changes based on the FROM country. You can use Wise to send USD to a DR USD account but the charges are much much higher due to the use of intermediary banks. Hopefully they will add DOP as a destination currency soon