Yes. Phoenix OS 3.x (Android 9) supports Termux and APT perfectly. However, Phoenix OS 1.x (Android 5.1) requires an older Termux build (find it on GitHub).
The keyword leads to a powerful capability: turning your Android desktop OS into a full development machine. By using Termux (with its internal APT wrapper), you bypass the limitations of Android’s native shell. apt tool phoenix os link
We will focus on the most stable method: . apt tool phoenix os link