It’s up to nationality level. In the US there is no such thing at the state level of any state.Puerto Rico definitely has a strong culture just like the DR. Look at all the artists from Puerto Rico.
PR even has its own PR teams in many sports competitions including in the Olympics. They compete with the teams of many other countries including the USA. You will never see that with a New York (state), Florida or California team and it’s unimaginable for a match of Texas vs the USA or Alaska vs the USA; but that does exist with PR.
There are also other signs that make PR different from the USA. For example, everywhere in the USA speed limits are in MPH and distancies in miles, but in PR speed limits are in MPH but distances are in kilometers. In the US gasoline is sold by the gallon, but in PR it’s by the liter. Etc…