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.
# Chinese Fonts for Waveshare samples This components provides Chinese Fonts used by Waveshare E-Paper sample code. Original Waveshare Sample code can be found at: https://github.com/waveshareteam/e-Paper
idf.py add-dependency "dannys42/stm32xx_fonts-cn^0.0.1"