Any way to adjust rig/skeleton in game?

hello.
i currently trying to customizing charecter in game.
i use Morph, and its work fine.
but skeletons arent adjust at all.

i used animate retargeting system, and its work wonderful.
if i can use animate retargeting in game(i mean use function in blueprint or c++) it would be super.

can i use animate retargeting system in game?
or else, any other option i can try?

please give us keyward or else. we are really in tight schedule ;_;

Thanks.

ps, here is currently link text

issues. thanks again