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
Do not use those to charge, ever:
https://hackaday.com/2025/04/07/why-usb-c-splitters-can-cause-magic-smoke-release/
Really depends on if it has a proper internal USB hub or not.
And with a non-PD charger its perfectly safe.
But very good point, that you do need to be careful. Especially with Aliexpress junk.
Edit: tested mine, which is a Y cord thing, like the first link, and it does not pass more than 5v to the audio side. So it really depends what you get. You can’t power it from the audio side either, so there must be some kind of proper isolation.