I bought these off of Amazon today:

Vodche Large Gel Seat Cushion, New Upgrade Seat Cushion with 2 Pack Non-Slip Cover Super Breathable Honeycomb Design Relief Back Pain Egg Seat Cushion Pad for Car, Office Chair, Wheelchair, Home https://www.amazon.com/dp/B07YDPJPZZ/ref=cm_sw_r_cp_tai_-0cyEb7KB67PX

I'm hoping I can hide it under my seat cover and this will lock it in place so it doesn’t move around too much. Do you have a link to the one you bought?