Responsive Classic Sideboxes not show on tablet.

On the following site
httpsCOLON//test222DOTrarecoinsandtokensDOTcoDOTuk/
the sideboxes are not visible when viewed with a tablet and phone screen.
Also, the 3 bar menu on the phone does not list all categories...... just one of them.
I would appreciate help in solving this loss of info and navigation .
Responsive Classic.
version 2.2.2
PHP 8.3

Sorry I can't answer your original questions, but if you're not too far in with your test, I'd recommend switching to Responsive Classic Redesign or ZCA Bootstrap template. It might seem like a pain at this stage, but you will see the benefits later on.

Main difference is that the built-in RC template is not really responsive, it actually depends on the MobileDetect class for some features, whereas a true responsive design means it just depends on screen size and nothing else.