How do I include the C++ concepts library into a VS Code PlatformIO project?

Libraries
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1

I’m trying to do #include <concepts> into an ESP32-S3 C++ project.
I’ve configured the project to use C++20. The compiler accepts my own concepts, but still I can’t include the concepts library. It seems like PlatformIO just doesn’t have it implemented.
The error message is:
fatal error: concepts: No such file or directory

2

I am not an expert here, but it is not because PlatformIO has not implemented something, but because Espressif has not implemented it in the xtensa-toolchain.

3

If you’re already using the latest toolchain-xtensa-esp32s3 package, using platform_packages if needed, and concepts is still not available, it’s a fault of the toolchain. Not “PlatformIO”.