Apple is letting companies make 3.5mm to Lightning cables now

Apple is letting third-party companies make more kinds of cables and accessories under the MFi licensing program, including new 3.5mm to Lighting cables. But there’s still no third-party Lightning to USB-C cables available.

Insignia White Lighting to 3.5mm Headphone Adapter - 2 ct

Apple USB-C to 3.5 mm Headphone Jack Adapter

Compatible with, iPhone 12, 11,11 Pro,11 Pro Max,XR,XS,XS, X, iPhone 8 8 Plus, iPhone 7,7 Plus, 6,6s, 6 6s Plus, iPad, iPod, etc., With more OS

Lightning to 3.5 mm Headphone Jack Adapter, Apple MFi Certified Veetone iPhone Audio Dongle Cable Earphones Headphones Converter Compatible with

USB-C to 3.5mm Audio and 60W Charging Adapter

A tangle of cables is the price for Apple's innovation

Rumors of Lightning's death are just slightly exaggerated - The Verge

Archimago's Musings: MEASUREMENTS: Apple's Lightning to 3.5mm Headphone Adaptor [MMX62] (CES 2018 Creative Super X-Fi audio, and A/C cable proof?)

RockStar™ 3.5mm Audio + USB-C Charge Adapter

Apple MFi Certified] iPhone 3.5 mm Headphone Jack Adapter, Lightning to 3.5mm Headphone Aux Audio Dongle Splitter Jack Adaptor Compatible for iPhone 11/11 Pro/XR/XS Max/X/8/7,2 Pack