Before [spam] literally every porn girl escorted. Now if they are making good money on OF, they generally are not unless it's a serious offer.
Most would openly advertise on websites that booked porn star escorts. But quite a few of them would be what was called "under the radar". Meaning, they will say they don't escort, or even publicly condemn it; but would be available if you were someone who could connect through the right madam and could be trusted to keep it 100% off the record.
I did the porn star escorting thing for many years (2 - 3 times a year) in my younger days because i thought it was cool to fuck porn stars. So ,I met some under the radar girls several times, and also just booked some who were open about it.
Anyone in porn who has been to Dubai, is going there for huge money to be torn apart by Saudi royals and various members of the royal familes in the Emirates. Just a fact. They get massive sums for it , specifically so they will do whatever is asked of them. THe inside joke is you go, make 50 grand, and spend a month back at home letting your asshole heal

If you do your research pretty much all of our active euro based LegalPorno girls are available for escorting and privates.
The prices are premium and they have other income sources so they are a lot more picky about who they meet. Porn girls running tricks by the hour out of motels in LA or Vegas are not common anymore. It's mostly higher priced stuff, sugar baby relationships, etc.
Lisa Ann was famous for the under the radar girls. She would constantly condemn escorting but would some how be staying in 5 star hotels and be luxury box guests of college and professional athletes on a regular basis. She would be one of those "i dont escort these are friends" while thousands of dollars in gifts end up in her life

You would be hard pressed to find any porn star who has not escorted, ever. Some may have stopped due to their OF income , but would still potentially meet very well off private men.