Hi Salvatore,
if I interpret correctly, the needed patch is added for -3, but not yet
released: "firmware-nonfree (20190717-3) UNRELEASED; urgency=medium"
https://salsa.debian.org/kernel-team/firmware-nonfree/-/commit/c11789ce8f522f8d2f7ff83b535d6ae059fc865f
On a Lenovo E595 (AMD Ryzen 3700U), problem is with kernel 4.19 from buster the
GUI is not working (X fails to start) and with 5.4 from backports GUI works, but
the WIFI is not available - what a pity :-(
I'd really be happy if you could make available an updated version of
firmware-realtek.
Regards,
Holger