EDIT: I downloaded a Debian package from debian.org website (via wget "ftp.us.debian.org/debian") however the package downloads as a text file and not *.deb on my Debian Buster. Why is that?
I was ultimately able to install the package on my Debian (with some unment dependencies) by downloading the package first to my Mac (which did download the file as *.deb) and then opening that file on my Debian computer.