Hi, I bought couple 2.25" tft's to play with. Had some trouble to get it working with esp32, turns out chip is not st7899, but it is st7899P3.
Got it sorted based on this websites examples:

https://www.buydisplay.com/spi-tft-2-25-lcd-76x284-display-module-st7789-breakout-board-for-arduino ...