Currently, Apple’s only new device which offers the headphone jack is the new 10.2-inch iPad 9. The iPad mini 6 does not have a headphone jack and supports Bluetooth wireless headphones or wired headphones with USB-C port support.
In 2016, Apple permanently removed the headphone jack from its smartphones, starting with iPhone 7. The company said it was time to say goodbye to 150 years old components to be able to fit in new ones. At the time, Senior Vice President of hardware engineering, Dan Riccio explained that;
The audio jack was taking up a lot of valuable space which could be used for the placement of hardware like bigger batteries, processors, stereo speakers, or camera equipment in the future. In the new iPhone 7 and iPhone 7 Plus, the extra-valuable space is used for the installation of a Taptic Engine for the new pressure-sensitive home button which has made it possible to deliver an IP67 standard water-resistant iPhone.
Along with older iPad and iPod touch, the new iPad 9 is the only device that supports headphone jack
Starting at $329, the 9th generation iPad is been upgraded to a 10.2-inch display, A13 Bionic chip, new all-day battery life, 12MP front camera with Ultra Wide lens, Center Stage, and other innovative features. But has the same older design language with larger bezels, a physical Home Button, and a headphone jack, as per the tablet’s tech specs. Perhaps the company is pushing the new iPad 9 for students, therefore it included a headphone jack so that school headphones are connected.
Besides, the low-cost iPad, iPod touch, and iPad 9, Apple has removed the headphone jack from the entire iOS lineup. Apple’s introduction of AirPods facilitated a relatively smooth transition for the user from the headphone jack to wireless headphones.