In reading about the new ESP32-P4 I was very excited to see a faster dual core, more I/O, and they put back in the ethernet, that they took out of the ESP32-S3. What blew my mind and made me say what were they thinking, was they removed Wi-Fi & BT. Seriously Espressif? Who makes these crazy decision...

Try platformIO. Its the simplest way to get started for ESP32.

IF your ESP is getting hot you have something else going on there.

but some things could be in C/C++ if the interrupt latency was consistent.

Are you using Arduino or IDF?
If IDF have you tried going into menuconfig and try
"Run FreeRTOS only on first core"

Look at the many examples

You didn't mention what LCD your using. ESP32 flavor your using, wiring that you did, or code that your using.
How could anyone possibly answer your question ?

Your initializing SPI with Adafruit_ILI9341 with TFT_CS.
Then your doing the same later with XPT2046_Touchscreen touch(TOUCH_CS);
so it overwriting the first SPI instance of the TFT.

https://www.freertos.org/a00020.html

Did you try vTaskDelay(1 / portTICK_PERIOD_MS); instead of yield ?

That info is in the data sheet