I am married to a PR lovely and know more than a bit about the place and the people. The census changes were actually an item in the local news/online.
The link I posted at #121, above, refers to 2020 Census data. Regarding your point that Puerto Rico and, for that matter the United States as a whole, is comprised of a multiracial people gets no argument from me. Again, I merely pointed out what the 2020 Census revealed about self-identification. It seems from the 2020 Census table I linked, people who self-identify as Hispanic or Latino (which are not “races”) seem to comprise the vast majority of those who self-identify as “white.” Beyond that, I don’t have the time or the interest to reconcile the very different statistics in the Census data and in the Miami newspaper article you linked.