[octanechicken] has a possible adapter solution that lets you plug ... link to a previous featured article moving the headphone jack on a new Yamaha DGX-630 keyboard.

This airline adapter converts a dual-prong airline jack to a standard headphone stereo plug (3.5 mm, 1/8 inch). Plug the headphones cord into the adapter and insert it into the airline jacks to ...

Apple phases out Lightning to 3.5mm headphone adapter, pushing users toward wireless audio and USB-C solutions while third-party alternatives remain available.

I've used other products which have the jack (sometimes multiple jacks ... I've used a number of Bluetooth headphone adapters designed for in-flight systems before, but the sheer simplicity ...