Enjoy it while it lasts, folks. Android has since implemented restrictions on which binaries may be run from an installed app; any spawned processes must also come from binaries installed from Google Play.

Termux is currently grandfathered in because it's still built against the last API version not to have these restrictions (28?). But it's only a matter of time before that version starts throwing "This app was built for an old version of Android and may not work properly on new devices" errors and then, stop working altogether...