At current LibreELEC shows an error (Invalid parameter) when trying to connect to an EAP wireless network, it seems support has not been added for providing an authentication identity. Is there any chance of having this feature added?
There is no support for EAP networks in the settings add-on GUI because nobody on staff has ever had access to an EAP network to figure out what's required to support them. You should be able to set the required things from the console using connmanctl or putting the required config in whatever text files connman requires. I suggest having a look at HOWTO guides for Arch/Ubuntu etc. to figure that out. And, if you succeed, some code to add support or fill missing gaps is always welcome.