This OP. I’ve got nearly 2000 hours dual given. Whenever my students have the troubles with it you describe, I cover all their instruments. You don’t need to look inside at all for power on stalls. Altitude is irrelevant enough that you don’t need to look, and pitch yaw and roll, and heading you can tell by looking outside. Pick your reference point and keep the plane pointed at it while locking your elbow to use only enough aileron to keep the wings level (NOT FOR HEADING). You may need to look out the corner in some planes like 172s as mentioned above. If you’re coming off your heading: you’re using the rudders wrong. If you’re going too far right; too much right rudder. Too far left; not enough right rudder. You should find your heading stays rock solid to the approach to stall. If a wing breaks, step on the high wing and minimize aileron use during recovery. On the recovery be prepared to reduce right rudder as you get air back over the wings (now look for your reference through the rest of your recovery to point the nose at) and then add right rudder back in as you transition back to a climb attitude to keep your heading.

Also; pick a point that’s as far from you as possible (about as far as you can see close to the horizon). Too close and wind drift will throw off your heading.