Hello Ana!
These look to be in good shape in general. For the VCSs', you have two options; if you want to join DPMT, you could put them under their hierarchy, or you could use the Debian heirarchy and I can grant you permissions for the repos. Let me know which one you'd prefer to do.
I do have one tweak I'd like to see for python-tldextract; I think we should have it Recommend `publicsuffix` and add that to the list of PUBLIC_SUFFIX_LIST_URLs. Please test it to make sure it works even without that file; reading the code, it looks like it should, but I'd like to double check.
For python-lexicon, it's generally considered good practice to use the same license for the work under debian/ as the rest of the package is. If the difference was intentional, I'd want to know more about why you feel the difference is important.
Let me know if you have questions; a couple of minor changes and I think they're about ready to ship!