In shop page user can open sidebar and see product categories widget, and can easily navigate with this widget cdn.discordapp.com/attachments/1059559562069414038/1076580607922016326/image.png
When user goes to single product post, there is no dragable sidebar like in shop page. Sidebar goes under content, so its strange user experience, when in one page you have draggable sidebar and in another sidebar under the content, its hard to navigate on mobile.
cdn.discordapp.com/attachments/1059559562069414038/1076581229601771720/image.png
I would like to just add product categories widget to mobile menu, but as I see, I cant just add it as one nested item, I have to drag and drop all menu structure by hand, its to time consuming, because categories always grow.
What would you recommend it this case, so user can easily navigate thru product categories on mobile?