Possible to download custom animated armatures not found in mixamo

Hello everyone. I am new to blender and I still have a lot to learn. I am wondering if anyone has made their own animations using the mixamo add on rig that would be willing to share? Like someone riding a horse or a motorcycle, for example. or any other unique movements not found on mixamo. if there is anyone out there who can help me out, I would appreciate you immensely. Thank you in advance.

This is a developers talk forum, try asking in https://blenderartists.org/