I hate to say it but the apple type c to 3.5mm jack dongle is actually really good and all you really need. You could go for a balls to the wall dongle setup with a micro DAC that plugs into the phone bit youre starting to get into the placebo effect area of audiphile stuff

Have you tried any IEMs? I know they are wired but I have a pair of moondrop x crinacle dusk 2s that are amazing sound. I do want to upgrade to the new dusk model with the planar drivers but I dont have the free cash atm

I love my Sennheisers they work really well and dont feel weird in my earussy

You drive on the wrong side of the road, for you its the right lane