You are using staging server - a separate instance of the ESP Component Registry that allows you to try distribution tools and processes without affecting the real registry.
# Waveshare core E-Paper functions and graphics library This components provides the core e-paper functions and graphics library used by Waveshare sample code. Original Waveshare Sample code can be found at: https://github.com/waveshareteam/e-Paper
idf.py add-dependency "dannys42/waveshare-epd^0.0.1"