Use all 4mb on Esp32 for app

I am not using psram (have it disabled) and dont need OTA is there a way to utilise all of the esp32,s 4mb ??
Selecting "Huge APP (3MB No OTA/1MB SPIFFS) only gives me 3mb so it,s no good.
Any guidance would be greatly appreciated.

It may be time to look at the ESP32 memory map to find that it will not be possible for you to use all 4MB of ram for your project.

PSRAM works for 4MB under the Arduino IDE.

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