Lil Tater Tot

Anybody else still have a little potato baby? (I say that in the most loving way possible!) Ever since he learned to roll over a few months ago my 8mo old has insisted on avoiding any semblance of tummy time by immediately turning onto either his back or side, so learning to crawl seems like it’ll never happen, much less pull himself up and start walking. He can sit unassisted for minutes at a time before he gets too excited and throws himself backward, can stand with assistance/leaning against something, but for the most part he’s completely satisfied wherever you leave him. Won’t even really push up with his arms in the few seconds he stays on his belly, just keeps his head lifted before rolling. We’ve tried enticing him with things we know he likes and he’ll reach out, but nothing seems to motivate him to start moving. Anyone have any tips?