just to check you have the Slim 7x? both internal speakers and microphone work on mine.
can’t think of anything special about my setup. i just installed Ubuntu 25.10 ARM, followed by x1e PPA, followed by qcom-firmware-extract, followed by my instructions a few posts up.
obviously need to apt upgrade and reboot
btw. the camera does work but involves minor editing and then re-compiling the slim 7x .dts from the ubuntu concept soure code ( How to build your own Ubuntu Concept X Elite kernel ) into a .dtb and then replacing the current .dtb. i got a bit lost on how to do this but shouldn’t be massively complicated if you are determined (https://gitlab.com/Linaro/arm64-laptops/linux/-/issues/9). The Linaro people seem to be also adding some commits to their repo around the Omnivision sensor so this may be added to x1e PPA in 1-2 months if you’re prepared to wait.