DC is set by the constitution, thus requiring a constitutional amendment. PR is technically a sovereign state and will require a vote of its people to become a state, subject to all the reg’s and taxes of the feds.
I was only responding to to the headline that refers to 50 votes to pass.
I assume a statehood referendum in PR would pass overwhelmingly since it’s a poor demographic (median household income ~ $20k compared to say Mississippi ~ $45k)and everybody would be on SNAP, SSI, EIC, etc.
Some of those programs exist in PR today but they are funded at much lower levels than in the US.