Gira that is the setting that will affect it as the hardening and improved security of GOS has demonstrated BimmerApp to have a latent memory corruption bug that the developer hasn't resolved, the only way to get these apps working that need this function is to disable the hardening.
The project added the feature to ensure that people could have the option to remain no compromise and find alternate apps or for those that don't wish to or can't for whatever reason they can make the informed decision to disable it.
GrapheneOS is for everyone™ after all ;)