Ok so the 2nd package did not get installed because i386 arch is not added, you wouldn’t face this issue if you’re using the custom 2020 image, so please run the following command first:

dpkg –add-architecture i386

Then install the 2nd package again (the one below)
http://ftp.us.debian.org/debian/pool/main/p/python-typing/python-typing_3.6.6-1_all.deb