Duo's wanting to meet asap is always a red flag. But flags can change color if / when other items line up.
At its core, selfie verification only proves that the person in the pics looks a lot like the person who is in front of the web cam used to "verify." But that person could be anywhere on the planet, using a VPN to make her location look local to you.
Having you send your number is a yellow flag. But you can mitigate that risk by sending a burner number of course. Assuming "she" replies you can then evaluate her number and see if it makes sense (country code, area code, etc.).
I assume you did a reverse image search on her pics. So you can add the search results to the evaluation process.
Finally, assuming you haven't already disqualified her (or them, I suppose), you can propose a FaceTime, WhatsApp, or even Snap or Telegram video chat.
Of course, you may have already decided it wasn't worth your time to try to "prove" she's not a scammer. Reasonable decision.
Can't wait to hear what happened...
Life is good
The Cat