How to organize the opening of the menu of the store (categories) OpenCart up to the third level of nesting?

Question

User navigation

There is a navigation menu (standard OpenCart menu) (on the left)
ddeminkp.beget.tech/korma
It expands only to the second level of nesting, and I have three levels of nesting of store categories, please tell me where and what needs to be corrected

Answer 1

Freelance.

Answer 2

It is better to contact specialists who will be able to finalize your site, optimize it correctly and make it ready for further promotion.