What worries me more is behaviour of Termux developers. They make dubious claims and effectively sabotage their own application (more on that below).
The solution to Android 10 problems — a software wrapper called "proot" [1] — has already been found. That solution would allow to keep all of Termux functionality and preserve existing package managers (such as apt). Proot allows Android user to compile C code in Termux (which they currently can do) and does not require major changes to Termux itself.
Termux developers refused to adopt proot as solution and even removed it's mention from their wiki on Github. Instead they are insisting that all Termux packages should be distributed in Android apk files, published on Google Play. That "solution" has major usability issues, does not scale (it uses shoddy Android PackageManager to track all Termux packages) and would prevent users from using Gcc and other compilers in Termux. The only claimed upside of using apk files is that it would better comply with Google's policies.
Termux developers justify their actions by following arguments:
1. Termux packages require a lot of bandwidth to host, and Termux does not have money to pay for their mirrors; hosting packages in Google Play would be preferable. That statement is nonsense — even fringe Linux distributions like Artix can find FREE mirrors, willing to host their packages. This is usually done by contacting curators of existing servers, that host Linux packages, and asking them for support. Termux is more popular than some of Linux distributions, but it does not look like Termux devs even TRY to do that — they apparently just sit on their hands, occasionally begging their sole mirror provider (JFrog) for more bandwidth.
2. Termux currently does not comply with Google's policy and it's developers are afraid, that this will result in removal from Google Play. They are technically right, but they are making mistake by downgrading experience of their app in attempt to pacify Google Play censors. They are making even bigger mistake by displaying guilt about that — Termux does nothing wrong, and the display of guilt is a better excuse to punish them than their actions.
1: despite it's name, proot does not require root access