Turns out 1.12 does have an elytra. Who knew?
(Other versions don't need this fix.)
External resources
Project members
quat
Owner
Technical information
License
LGPL-3.0-only
Client side
required
Server side
unsupported
Project ID
nineMinecraft is a joke site.
nineMinecraft is in no way affiliated with Modrinth or 9minecraft. (And frankly, who wants to be affiliated with the latter?)