Hello @tgeddings
I don't know UIFlow, but there are bar graphs in the Arduino IDE.
The LCD has a progressBar command.
https://github.com/m5stack/m5-docs/blob/master/docs/en/api/lcd.md
progressBar(int x, int y, int w, int h, uint8_t val);
0_1643144507084_M5_VS1053s.png
LVGL has many display functions as well as bar graphs.
Light and Versatile Graphics Library：https://lvgl.io/
UIFlow is a port of LVGL, and the addition of functions is always delayed.