Because I added secure boot and flash encryption the bootloader got bigger。

I encountered the same problem. Have you solved it? I now also need to enable flash encryption under the esp arduino framework. I need to enable encryption function and modify the starting position of the partition table I found that it has not been successful.

I have changed here

Thank you very much, you are amazing. Also do you know how to enable flash encryption in the platform + arduino environment? I have experienced it in the idf environment, but the flash encryption configuration is not found in the sdkconfig under arduino, and the new ones have not taken effect. Do you need to recompile sdk?

There is zero support for flash encryption in/with Arduino and Platformio. I am not going to invest time to add support in pioarduino for this. It will generate many issues from users bricking there devices. You need to add scripts to add the functions (and implement support in Arduino).