Tab completion / autocomplete does not work on a Raspberry Pi

[wavesailor]

• Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
  Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): Raspberry Pi 4 Model B Rev 1.1 - Raspbian GNU/Linux 11 (bullseye)

• CircUp, A CircuitPython module updater. Version 2.0.4

• Python version (run python -version or python3 -version): Python 3.9.2

• Error message you are receiving, including any Python exception traces: Tab completion / autocomplete does not work on a Raspberry Pi

• List the steps to reproduce the problem below (if possible attach code or commands
  to run):
  For example:

Using the example from the docs, it does NOT Work

circup install n + tab -circup install neopixel (+tab: offers neopixel and neopixel_spi completions)

circup install a + tab -circup install adafruit\_ + m a g + tab -circup install adafruit_magtag