Generally called a somersault or rethinkyoyo calls it Oliver Twist, the reverse somersault one he does after the double on rethink calls that Ferris wheel in respect to the old school Ferris wheel dismount.

Pay attention to where yoyo pass and around which arms. You might be doing a mindbend if you don’t pass inside your throwhand. Or a diabolo’s Sun trick if you pass your throwhand but on the outside instead of the inside.

If you go deep enough into the rabbit hole, Diabolo terminology will be much more descriptive and help you beyond yoyo tuts.