Package not installing on PureOS from Debian repository

Code:sudo apt install firmware-misc-nonfree results in

Quote:

Reading package lists... Done Building dependency tree Reading state information... Done Package firmware-misc-nonfree is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'firmware-misc-nonfree' has no installation candidate

I know the source is https://packages.debian.org/buster/firmware-misc-nonfree, which I've enabled since my /etc/apt/sources.list.d/sources.list is Code:deb-src https://packages.debian.org stable non-free, and I know it's a deb-src and not a deb since the source is https://packages.debian.org/source/buster/firmware-nonfree.

I don't know what to do, any advice?