As of now, they are considered NXT stars visiting the main roster but that will change soon.
As reported in the Wrestling Observer Newsletter, Ricochet and Black are making a permanent move to the main roster. They are scheduled to wrestle at NXT TakeOver: New York so that could be their swan song on that brand.
Meanwhile, Johnny Gargano’s situation is uncertain. He is scheduled for a major match at TakeOver: New York but it will not be against his originally scheduled opponent Tommaso Ciampa because Ciampa is currently out of action after undergoing neck surgery. He’s not expected back for at least 6 months, if not longer.
Kairi Sane is someone on the list to be brought up soon to the main roster.
If you want to know what WWE has planned for Gargano, Black, and Ricochet at TakeOver, then click here to see the full TakeOver: New York card. Note, that is a spoiler link because the card has not been announced yet on NXT TV.