LOL Here just trolling us, uh?
http://wololo.net/2018/05/24/why-th...and-why-you-should-stop-asking-for-a-release/
"You might not believe me, but the PS Vita is powerful enough to emulate the PS2, at least with a compatibility similar to, or even better than, a non-BC PS3."
Obviously Vita can't emulate ps2, now and never...
No need to get snarky.
I stand by what I said, you may wish to wait until such an emulator appears before getting too excited.
From that same link:
"Disclaimer from Wololo: for some reason this article has generated more controversy than it should have, with in particular established hackers in the Vita scene voicing their doubts that the Vita has the power to emulate the PS2. This is a reminder that opinions expressed by the bloggers on this site are their own. The article below contains AcideSnake’s opinions on some aspects of the Vita scene, and although I don’t necessarily agree with everything Acid has to say, I still find this article a great read. Please use your own judgement when reading."