Chats are off chain so cross platform require others and community adoption and only reason we might bring people from discord and other messaging app if we can offer same level of features and convenience. Our chat is based on well maintained and reliable opensource tech. Cross platform is choice of front ends ultimately. Actifit and Snapie implemented/integrated Ecency chat. We have simple integration documentation, if other apps consider implementing: https://docs.ecency.com/developers/chats/