I see a lot of people complaining that the Fairphone 6 doesn’t have an Aux jack.
Just use an adapter cable.
A 3.5mm Aux jack takes up a significant amount of space just to connect a few wires that could be connected through USB-C anyway, that space could be used for a bigger battery.
Even if there was a good enough reason to keep Aux it should be 2.5mm Aux and not the usual 3.5 as it does exactly the same thing but uses less space
Something funny about those: sometimes they just don’t work. Seriously. Depending on the phone, the brand, those splitters just will not function because the phone decided it cannot do both power and media from the same port at the same time, if it’s split up. I tried 4 different ones before finding out my phone is too dumb for it, and same with most friend’s phones.