If i want to retarget standart animations from engine on mixamo rig - my model can be applied to unreal marketplace? It will be taged as rigged to unreal skeleton?
Typically, it would be tagged as ‘scaled’ to UE skeleton, but not as ‘rigged’ to it, because it will require retargeting. Take a look at marketplace guidelines, sections 2.3.1 and 2.3.2
Marketplace Guidelines - Unreal Engine
Many asset packs offer both the animations for the unreal mannequin and the custom skeleton, in this way you can check if they’re working correctly for the default character and save some time to other users (especially in UE5 because the new retargeting system is really good but kinda slow to setup)