The first time a Flowcode (ESP32) project is compiled, a sub-directory (with the same name as the Flowcode project) is created, and the default sdkconfig is copied there. Subsequent edits and compiles of the same Flowcode project does not overwrite that sdkconfig file. So the sdkconfig file can be c...

Yes, it is possible to use 32F446RE setting to create project for an 32F446RC device.
Also, attached is (an unofficial) FCD for the 32F446RC