Amazon.com: Cubilux Lightning to 3.5mm TRS Microphone Adapter with Headphone Jack Compatible with iPhone 14 Pro Max 14 Plus/13/12/11/SE 2/Xr/Xs Max/8/7, 1/8” Audio & MIC Splitter for Old iPad (Lightning Version) :
Line Level Audio Cable | iPhone Attenuator Adapter for Line in Recording
8-pin Foster to 1/8in (3.5mm) TRS and RCA Cable – FlexRadio
Amazon.com: Headset Buddy Line-Level Audio Adapter with Built in Attenuation for iPhone, Smartphones, Soundboards and Mixers (iPhone-Mic-Line) : Electronics