I've just discovered this COD custom emblem scene, and the number of pony emblems out there is incredible, along with tons of tutorials.
Here some channels that have quite a few:
https://www.youtube.com/EquestrianEntertainment
https://www.youtube.com/@LumaPrivateMatch (this one is recent and its actually alive)
https://www.youtube.com/playlist?list=PLEiS5OmFs4u4Y5IDnUDcg3ysKyOIoWgk6