I know that 14 hours of PIC is the requirement for an MPL.
For what it’s worth, I don’t think there’s much of a correlation between how many PIC hours you have and how good a commercial pilot you become.
There’s obviously a very strong focus in the commercial world on CRM and teamwork nowadays, so the skills gained in multi crew simulator hours are, IMHO, more relevant to the job than the number of hours spent by yourself in a Cessna, as valuable as that experience is.