How to add new modules to package/kernel/linux/modules/

I'd like to add a new sound module package for some AMD hardware. When I boot into an Arch Linux live image, identified the modules in use for the chip with lspci -vvv

05:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor (rev 01)
Kernel driver in use: snd_rn_pci_acp3x
Kernel modules: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x, snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, snd_pci_ps,    snd_sof_amd_renoir, snd_sof_amd_rembrandt

I am wondering if modifying package/kernel/linux/modules/ is the right way to supply a new package? If so, how can determine what to add? I am seeing several entries that are likely for modification: