Tummy time concern

I forgot to mention this to our ped at our 6 month appt on Friday. I brought it up at our 4 month appt and she said he just needed more tummy time and would stop. He hasn’t.

Often when on his tummy he Superman’s. He picks up both hands and kicks both feet. He does this all the time. He ALSO can get up on his hands and knees and rocks, like he’s prepping to be able to crawl soon, but spends much more time supermaning than on his hands and knees.

Does anyone else’s LO do this? Would you recommend talking g to the ped again?