A "crippled" (in capabilities) version of Termux is on GooglePlay - that which targets the latest SDK instead of the last before forbidding execution of binaries outside the APK.

See https://github.com/termux-play-store/

Thanks. That was very clear and informative. Props to them for producing excellent documentation of what's going on.

By the way, I'm using the Play store version and don't have any issues but all I do for now is read man pages and use ssh.