Considering how the sanctioned store basically already acts like malware, you're SOL, but you should be fine as long as you stay away from apps by Rahul Kumar Patel.
Recent versions of Termux are not available on Aurora Store because they are also not available on the Play Store. However, whyorean also develops Aurora Droid, an alternative F-Droid client, which does have the latest version of Termux. (Aurora Droid has not seen updates for a while.)
whyorean's apps are trusted by many Android users, and I don't know of any good reason to avoid his work in general.