Lance Dash Jump Finishing attack

[Serge le lama routard]

Hi fellow hunters,
I've seen on some boards that you can perform this move called finishing thrust after or during a dash jump thrust. From what I've seen it's been here in previous games too. I'm new to world but not new to the franchise and I've never performed that move.
It's said that you must jump during the dash then hit Y/triangle to thrust in midair then use Triangle/Y again to perform the finishing thrust. Shouldn't be so hard to pull off.
Is this an Iceborne new move (I've checked, it shouldn't be) or it just doesn't exist?
Thank you guys

[Haaz]

It does existe but it is a super secret move only those whomst are chosen can perform ! Don't tell anyone !

[TrueArchery]

It's something they added in 4U (already in 4 I suppose, but the west didn't get that anyway).

Inputs are forward+roll while charging, then the basic attack.

[Xavr0k]

Doesn't exist. There is no follow up to advancing jump thrust.

[Dokainin]

you can't follow up after the advancing jump thrust. but the actual jump animation includes an attack with pretty good MV, if you then land after the jump you can go into the Finishing Thrust.

not sure its worth it though since you are in the air for a while not attacking.