I don't have a fat tire bike, but have seen this one recommended a decent amount, they have geometry specs online
https://ursuscycling.com/products/jumbo-kickstand. You may be able to buy one from an ebike manufacturer, benno is a name I've seen that sells a dual leg kickstand for their boost, but no geo readily available. Taking it in a completely different direction apparently people like the clikstand, it's basically just a pole with a c on the top that holds your top tube but works a lot better due to holding the bike higher up. Separate piece to get out/lose not an easy foot kick though