Immersive mode in Termux? How can I enable immersive/fullscreen mode in Termux?

I want to hide the bars at the top and bottom of the screen so that the entire screen displays the terminal.

In summary, I'm looking for either a configuration option for enabling fullscreen mode in Termux, without reconfiguring (or rooting) my device and without connecting an external device, or an explanation of what happened to the fullscreen option mentioned in some parts of the documentation, if it has been removed.
I could have sworn immersive mode was a feature of Termux... You can still use immersive mode via ADB (or root, if you have that).

Hide both status and navigation bar: adb shell settings put global policy_control immersive.full=com.termux

Hide status bar only: adb shell settings put global policy_control immersive.status=com.termux

Hide navigation bar only: adb shell settings put global policy_control immersive.navigation=com.termux

Turn off immersive mode: adb shell settings put global policy_control immersive.off=com.termux