How to add Chat room message Edit and Delete feature in Jitsi and how to get chat messages in Jicofo logs?

Yep, you need to implement that part as it is not supported at the moment.

Can you suggest how can I do that?
Sorry for asking if it’s a trivial task to do but I don’t know where to add this support.

This should go in lib-jitsi-meet.

Thanks. And in which file?

Checkout how strophe.*.js stuff is implemented here

Ok. sure