The Bug:

Vexes don't have flying animations unlike allays.

I'm fully aware that this may be considered a feature request however, the triaging of reports such as MC-257392 and MC-257341 suggest the vexes should follow similar behavior to allays as allays were once unable to turn their heads.

Steps to Reproduce:

1. Summon a vex and watch it closely as it flies around.
2. Take note as to whether or not vexes have flying animations.

Observed Behavior:

Vexes would have flying animations. Currently, when vexes fly around, their model gives the impression that they're static and in some cases immobile, which looks quite strange.

Expected Behavior:

Vexes would have flying animations. In other words, vexes would lean forwards when they're moving through the air, just like how allays do.