Is there a way to install configuration profiles by code or cmd on MacOS Big Sur?

I use to connect 802.1x network by configuration profiles and install it by system cmd 'profiles' before.But Starting with macOS Big Sur, this cmd cannot be used to install configuration profiles. User should add profiles using the System Preferences panel. This change is inconvenient to user at all,is there a way to install profiles more silent or convenient? May be by code or cmd? I am also very curious how does System Preferences install profiles on Big Sur.