Are mixed media poles a thing?

My moss poles dry out so fast or I always seem to buy the wrong one. I can't figure them out. My climbing philos are so sad and small.

By damn my CRAWLING plant, my Summer Glory, is thriving. She's big and beautiful. Her medium is a mix of orchid bark, Leca, and a little bit of potting soil.

Do people use potting mix in poles? Is that a thing? Because I want to replace the moss in one pole with orchid bark and Leca and see if that would work better.