Try to scrape your foot more, the way you would do with an ollie.

Try to drag your foot longer and faster

Your sliding your 2nd foot too fast the higher the board is piped up before the 2nd foot is slide the higher any truck will be

Do the same steps as an Ollie

Try with a little speed it might help

Treat it like a Fakie Ollie lean away from the direction that you’re going in