The mod let player make smash attack while surfing.

Modrinth: https://modrinth.com/mod/elytramace

How to use:

1. Wearing elytra and holding Mace in mainhand
2. player in flying with enough fall distances (> 1.5 blocks)
3. manually attack an entity

Result -> The mod manages the attack to become a valid smash attack

Demo video: https://youtu.be/D_2W1BXkHQs