For timeless theme, the "Ask Question" is placed on the right above the toolbar as the design / layout is different. If you have disabled the headers of the toolbar, you wouldn't see it. I have enabled the headers and it is appearing correctly now.

Thank you. Tell me when EasyDiscuss will maintain Adsense Responsive Codes?

In EasyDiscuss 4.0 It will not only have responsive adsense support but a whole load of other features as well

I am extremely excited for EasyDiscuss 4

Great news. And the last question. How to make a button "Ask a Question" visible to the guests.

You need to configure the ACL for public users to have permissions to ask questions

Thank you.

No problem