Sequencer - is it possible to combine custom animations with control rig posing?

Like the question asks… When I’ve added a custom pose/animation from the MetaHuman, I have to mute the control rig that comes with it, otherwise the animation won’t work. Is it possible to combine the two? I have the idle animation that I like, but I’d like to somehow tweak it so I can pose the arm. Is this possible to do? Or would I have to edit the idle pose? Thanks.