I got a 3.5mm to USB-C adapter so that I can plug an external microphone into my 2021 Razer Blade 15 Advanced, but it's only detecting output, rather than a mic input.
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
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VOLT PLUS TECH USB C to 3.5mm Headphone Jack Audio Aux & C-Type Fast Charging Adapter Compatible with Samsung Galaxy S20/FE/ Ultra/S20+/5G/Fan Edition/Plusand Many More Devices with C-Port
USB C to 3.5 mm AUX Headphone Jack Adapter Cable for Samsung Galaxy S21 | eBay
Samsung USB Type C-to-3.5mm Headphone Jack Adapter White EE-UC10JUWEGUS - Best Buy
USB Type C to 3.5mm Female Headphone Jack Adapter, ZOOAUX 2-in-1 USB A
Samsung USB-C naar 3.5 mm Jack Adapter - Wit | bol.com
Best Samsung Galaxy S20 USB-C headphone adapters - Android Authority
USB C to 3.5mm Headphone Jack Adapter with Fast Charge,ivoros Type-C Audio Earphone Aux Splitter,Work for iPad Pro/Air 4/mini6,Google Pixel 6/5/4/3/2 XL,Samsung Galaxy S21/S20/+/Ultra/Note 20/10/Plus - Newegg.com
USB C to 3.5Mm Audio Adapter, Male to Female Nylon Cable for Samsung S20/S20+/S2 7445018367319 | eBay
USB Type C to 3.5mm Female Headphone Jack Adapter, JSAUX USB C to Aux Audio Dongle Cable Cord Compatible with Samsung Galaxy S23 S23+ S23 Ultra, S22 S21 S20 Plus/Ultra, iPad Pro,
Samsung Galaxy S20 Aux Adapter is Not Working - Fix Right Now - Back to Default
USB C Type c to 3.5mm Audio Adapter Cable for Samsung Galaxy S20 S21 S10 S9 S8 | eBay
How to Use 3.5mm Headphone With USB-C Type DAC Adapter on Galaxy S20/S20+/ Ultra - YouTube
Samsung Galaxy S20 - No Jack, No DAC, No Problems? - YouTube
Olixar Samsung Galaxy S20 FE USB-C To 3.5mm Adapter - White