Good to be back in the DR! been 4 years
The best place to know requirements is your AIRLINE'S WEBSITE. They are responsible for complying with the all the rules, and may even have to take you back if you get denied entry. Extra checks are most likely done at the gate. (flying back the USA is always the worst and even more under COVID)
I had problem with DR E-TICKET Address too, tried different browsers, language, and devices. It wouldn't let me select anything other than Santo Domingo ESTE. so in the Address blank where you put street & number, I put the entire correct address there. And my hotel wan't listed either.
by the way, NOBODY asked me or scan the QR code, either in PTY or SDQ. Migracion staff gave thumbs-up seeing it when I asked for correct line for Foreigners. (There isnt a separate line for residents and Diplomat line isnt clearly marked)
NOTICED the new Biometric Fast Entry Gates.... (like USA Global Entry) Anyone know the requirements?