linux-lts 5.15.87 fixes Broken audio (https://forum.artixlinux.org/index.php/topic,4878.msg31188.html#msg31188) with intel audio chips
I think you'll have to wait some time or try other kernel (mainline, zen, hardened) because lts is at 5.15.86 now on the 'system' repository.
It looks like it is on it's way:
Arch LTS Linux PKGBUILD (https://github.com/archlinux/svntogit-packages/blob/packages/linux-lts/trunk/PKGBUILD)
In is now in trunk on Arch.