Installing Webmin on Home Assistant OS

Hi, I’m looking to install Webmin on Home Assistant OS. I’ve got version 5.13 installed, with Home Assistant Core 2021.4.3

I’ve enabled SSH access but the usual debian options for installing it aren’t available (apt-get, dpkg etc).

Has anyone found a way to do it?

You can’t install applications on Home Assistant OS. That is what addons are for.

Perhaps you should look at one of the alternative installation methods.