According to the official data dictionary for 2019 to 2023 ACS PUMS data, OCPIP refers to "Selected monthly owner costs as a percentage of household income during the past 12 months".
If you are worried about the completeness or format of this "pusa-pusd" SAS dataset, you can always look into a CSV version in the official repository of PUMS data. The naming convention of the files contained tell you a few things, and I always like to start with Wyoming when exploring the structure of the data; Even though I live in the most populous state of California, I prefer to start with the least populous state of Wyoming to check what the data looks like before loading in the enormous size of the data I later intend to use.
So I start with csv_pwy.zip and csv_hwy.zip. The three-letters before the underscore tell me whether the format of the files are csv or SAS files within the zip archive; The letter after the underscore tells me whether the files represent a housing unit/household/group quarters per line (h) or each line represents a person (p); the last two letters represent a state abbreviation, which can be anything from California (ca), Wyoming (wy), Puerto Rico (pr), or even the collective of the United States (us).
I just checked both sas and csv versions of Wyoming person records and both had 286 fields/variables with 29,065 observations. So I have no reason to believe the larger files would be different.
Hope this helps!