How to adjust the toggle/transform on sidebars

I posted a question previously asking how to adjust the width of the sidebars, but didn’t get a reply. As I’ve since learned more about WordPress and the Hueman theme, I realise what I actually want to do is change the setting of the toggle/transform of the sidebars. (although being able to adjust the width would be useful as well)

Basically I’d like to have the sidebar toggle button available on both sidebars irrespective of screen width, and I’d like both sidebars to collapse at a bigger screen width than they currently do.

eg. Currently only the secondary sidebar collapses on iPad in landscape mode, and the primary sidebar stays open, with no toggle arrow, but I would like the primary sidebar to collapse as well like it does on iPad in portrait mode.

This is because many of my pages have a lot of spreadsheet data on them, so need the screen space.

Examples of layouts that this effects:
https://projectsplinter.com/filming-locations-map/
https://projectsplinter.com/locations-list/

With these pages the body becomes too narrow if I have the sidebars fixed open, particularly on a landscape view tablet, but I would like the sidebars to be available.

I’d be happy to pay for the pro version if I thought that this could be done with that.

Nb. My old query was here:
https://wordpress.org/support/topic/anyway-to-have-secondary-sidebar-only/#post-10289393

Thanks for the great Theme – still learning here

The page I need help with: [log in to see the link]