I asked this recently but forgot how to get the zoom feature on my  mavic air 2,  

Hello there. Good day and thank you for reaching out. Kindly please check if your DJI Mavic Air 2's firmware is on it's latest one then keep switch video mode to zoom, then press and hold function button and use wheel. In addition,  you need to be in 1080p 30fps or 4K for zoom to show up. Thank you.