Mod Version: Dragon Mounts: Legacy [1.19.4] [1.1.5.a2]
Forge version: 45.1.2

Another thing:
on creative mode, this is what I see:

And when I hover over an item, it shows me this phrase called "functional block":

is that part of the mod or not?

Also,
when I do the /give command, it doesn't work for the items in the mod:

it only shows me these 2 items.

Also,
there is another bug in the mod,
from the videos I've seen, when you place down a dragon egg and start its hatching process, then in the middle of the hatching process you break the egg, when you hover your mouse over the egg, it shows you the amount of time in seconds left for the egg to hatch, not for my case:

I've placed this egg down multiple times and waited minutes, nothing's changed.

Please help.

See #162 (comment)
for your first issues.

Secondly, eggs are meant to take a while to hatch. Please be patient. It takes longer than just mere minutes. As for the timer, its been removed in 1.1.5 in favor of those messages as the eggs no longer actually use timers, and relies on randomness.