Does anyone know how to loop animations in unity explorer or apply animations to a clone?
What do you mean by "apply animations to a clone"?
As for looping, I am annoyed myself how gallery animations are still treated as "timed sequence" for no reason, so I've messed with it two years ago I think. There was some success using library editing (dnspy) but it wasn't "enough" for me to share and now I no longer remember how to do it so can't help you beyond that.
What I did notice though, is that newest "double Male Cop" animation seems to finally be a looped one. Do try to check it for differences in dnspy and apply it for what you want to be looped.