I appreciate that more cables equals more waste and inconvenience. But your situation is more than likely not an issue for the majority. The options are out there. The arguments from some in here that a usbc to Aux is easy to lose is subjective. I've never lost mine, and it's been just fine whenever I've needed it.

If you want something to connect your phone to a stereo whilst retaining the ability to charge then there are adapters that have an auc outpit and usbc input that can work as well as systems, like one called wiim, that you connect to your wifi and aux into your stereo/speakers that can play music from most wifi enabled devices losslessly. Both of these options would be fairly futureproof as they would work with any new phone, stereo/speakers, or other device, regardless of which you upgrade.

I know that it's another thing to add on and costs kore money, but frankly, being angry about the lack of aux outputs on phones isn't going to change anything.

You can either complain and achieve nothing or adapt and make any phone you choose to buy work for you and your specific needs.

If the audio output on this phone is the only concern you have, then i think it's a small price to pay to support the many aspects of this phone that prevent explotation of workers and sustainability of materials etc.