Even assuming you send a direct message rather than leaving a comment on one of her posts, apps like IG, FB, X, even SnapChat, OnlyFans and TikTok can and do look at the text of your DM and will flag anything that even faintly smells like P4P chat. That could get you, and the recipient banned from the app.
If you can find a personal email (i.e.: @gmail, @proton, @hotmail, etc.) rather than an agency email (@agencyname - unless they agency as a Porn Star Escort Agency, of course), then that can work - sometimes. Use indirect words, like fan meet, or meet for drinks/dinner, etc.
What's the best way to ask without risking of getting unwanted attention, try to meet her somewhere where she can be approached one-on-one. Adult shows can be good for this IF you do it right. If she ever feature dances at a local strip club, that can work as well. Buy a $100 lap dance with her to get 3-5 minutes of one-on-one time.
Do not ask her "on the show floor" or in the show booth, or on stage, or when she's posing for a pic with you. If possible, find her at the hotel bar or when walking back to her hotel room. Then say hi, chat a bit and if you get a good vibe, casually ask her if she ever does fan meets. If she provides, she will know how to answer in the affirmative. If she doesn't, she will just say she does not.
Life is good
The Cat