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
Realistically you don’t NEED to do that, unless your battery is cooked. You can just charge your phone when not listening to music
If you really must then a simple splitter does the trick.

If this isn’t acceptable, then I’d argue that phones should have two USB-C ports, instead of one Aux and one USB-C
So what you’re me offering is limited use cases and additional equipment to achieve something that I can currently do with an AUX port.
This is not an upgrade or improvment … that’s just enshitification.
That is slighlty better, but a lot of headphones don’t actually support sound via USB-C and I’m also not aware of cheap, wired earbuts that use USB-C.
Sometime in the not so distant past I could have said: “but a lot of radio’s don’t actually support CD’s and I’m also not aware of cheap, radio’s that use CD’s, or a place to buy Cheap CD’s”
At some point we had to ditch tapes for CD’s or Digital media.
We can’t just stay stuck in the past because it’s convenient in the short term.