Amazon.com: Comica CVM-SPX-TC USB Type C to 3.5mm TRRS TRS Audio Adapter, with Mic or Phone Monitoring, USB C TRRS Adapter for Huawei Samsung Google etc USB Type C Smartphone Recording :
Wavo™ Mobile - JB01643-BWW | Joby New US
How to connect one Android mobile audio output to the microphone of another Android mobile? - Electrical Engineering Stack Exchange
Amazon.com: Cubilux Lightning to 3.5mm Microphone Adapter with Headphone Jack Compatible with iPad, iPad Air/ Mini, iPhone 14 Pro Max 14 Plus/13/12/11/SE 2/Xr/Xs Max/8/7, Lightning to 1/8” Audio & MIC Splitter :
USB-C Headphone Adapter for Galaxy S20/Ultra/Plus Phones - Earphone 3.5mm Jack Charger Port Splitter Mic Support Hands-free Type-C Headset Adaptor B4Q for Samsung Galaxy S20/Ultra/Plus - Walmart.com
Amazon.com: 12Ft TRS Male (for Microphone/Recorder) to TRRS Male Smartphone/PC/Tablet Adapter Cable Cord Wire for iPhone Smartphone Movo TAK Star BOYA by MM1 Rode VideoMicro Mic (NOT for Headphones or Speakers) :
3.5mm TRS to TRRS Smartphone Microphone Adapter Video Camera Sound Recorder App | eBay
Bluetooth 5.0 Transmitter/Receiver, Wireless 3.5mm Audio Adapter - Walmart.com
Amazon.com: Movo TCB2 XLR Microphone to TRRS Smartphone Adapter with Headphone Jack - Compatible with iPhone and Android - XLR Female to 3.5mm Male Y Splitter Mic and Audio Adapter, Must-Have Cable
Amazon.com: Headset Buddy Line-Level Audio Adapter with Built in Attenuation for iPhone, Smartphones, Soundboards and Mixers (iPhone-Mic-Line) : Electronics