ChatActivity is only available in portrait mode. Can it be set to landscape mode?

I’m using the default UI.
It seems that ChatActivity has been changed since SDK v5.16 and is now only available in portrait mode.
I would like to use Chat in landscape mode as well.
Is it possible to change the settings to landscape mode?

The new ChatActivity does not have the initial focus, so key operations are not possible.
Previously, the focus was on the Close button. Please fix this.

It seems like the focus goes off the screen even after I input chat and press the send button.
Please reply.