Hi! I read that offcanvas override dont available anymore after new update. My site has many style changes in offcanvas.php and now its dont work. Lucky for me original file in /plugins/system/t4/themes/base/html/layouts/t4/layout is still there. So i changed system file and it work like before for now.
I would like to know why you removed ability to override offcanvas.php and do you plan to return it? With this functionality, we could do really cool things, for example style for desktop screen like here
It is sad. I hope that you will return this opportunity.
Best regards.