Oops, not enough coffee yet...
There is a .tft. file for the 2.8 inch discovery. Forgot about that.? See all the available tft files here:
So without any eye to? possibel upgrades (of which there hasnt been any for a long while), any of the 2.8 Nextions models should work.
73
Mark
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AJ6CU
KD8CEC 2.0, Nextion Screens,? and open source uBITX Raduino boards for Arduino IOT, BLE, RP2040, Teensy 4.0, and Raspberry Pi Pico
https://github.com/aj6cu