from ARCH-Wiki 
Before [enabling](https://wiki.archlinux.org/title/Enabling) `connman.service`, ensure any existing [network configuration](https://wiki.archlinux.org/title/Network_configuration) is disabled.
ConnMan comes with the [connmanctl(1)](https://man.archlinux.org/man/connmanctl.1) CLI, there are various [#Front-ends](https://wiki.archlinux.org/title/ConnMan#Front-ends) available.
https://wiki.archlinux.org/title/ConnMan
Category:Network managers - ArchWiki 
So next time please share with us what you tried to do before it broke 
