Good point!
The __cplusplus macro is used to indicate the version of the C++ standard that the compiler supports
➜ It expands to a long integer value that represents the year and month of the standard.
199711➜ C++98 or C++03 standards.201103➜ C++11 standard.201402➜ C++14 standard.201703➜ C++17 standard.202002➜ C++20 standard.202302➜ C++23 standard.
runnning a simple sketch does show 201103 on wokwi