ESP32 Core Version 2.0.14 not available in the board-manager

Development Tools IDE 1.x
6

You may be using the wrong URL for the arduino-esp32 packages.

https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html#installing-using-arduino-ide

When using the stable URL, I see versions 2.0.14 to 2.0.0 then 1.0.6 to 1.0.0.

The stable URL: https://espressif.github.io/arduino-esp32/package_esp32_index.json

Never use the development URL for important work. This only for people
who intend to contribute code/issues to
https://github.com/espress/arduino-esp32. You will see the 3.0.0-alpha
release if you use the development URL.

The development URL: https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json