Use AP One Flex as WiFi Repeater?

Hi, I’m pretty new to this IT game. What I’m trying to do is connect my Pepwave AP One Flex to my wifi network via wifi (not LAN) and then re-broadcast that signal out at 2.4Ghz.

While I’m setting it up I’m hardwired from AP into my router, but I want them to connect wirelessly and can’t figure it out. Thanks for any help!