[muxator]

I fear not. My termux is installed from f-droid.

[trynewideas]

It was removed from termux-api in 0.32: https://github.com/termux/termux-api/compare/v0.31...v0.32

Discussed in termux-api issue #257: https://github.com/termux/termux-api/issues/257

Unless you build it yourself with the functionality restored, you can't use it. Termux maintainers are just that dedicated to targeting Google Play first.