I think I understand how it should feel as I was able to have decent rear foot in my LHBH, it's just a matter of habit for me that I balance on my heel when I balance on my left foot. And it makes a lot of sense when I think about, given some oddities about myself:
My left foot is pidgeon toed by a solid 20-30 degrees. You can check this by comparing the direction your knee is facing vs the direction your foot is facing when standing up. My left foot is pointing probably 20-30 degrees to the right of the direction my knee faces. This makes balancing (on the forefoot) harder than usual because forefoot is not in line with my knee, but rather inside of it. However, the heel is under the knee by default so subconciously I think I have always balanced on my left heel as it feels more stable. Fortunately, like my elbow oddity, this has not hindered my life in any meaningful way. And physiologically you can tell that I use my left heel more than my right because my right calf is bigger than my left. That means I'm using less plantar flexion in the left side.
All this not to say its an excuse, but I need to focus on staying balanced on my left forefoot through the x-step by using plantar flexion and then drive with that into the plant. From there my rear foot will do what it needs to do without thinking about it.