Add More Categories And Sub Categories To Menu View (Menu Window)

I would like to see if I can change the Menu View where it says 'View more →'

We have added all of our categories and sub-categories, and linked them to the main menu of our site. The problem we have is that we want to view all the categories in one view (or in one panel). It seems that it will only show 6 sub-categories.

We do not want to go to another page to view the rest. Is it possible to change settings so that we can see them all in one view?

I have attached screenshots for your reference

Screenshot 2020-08-03 at 11.48.05.png

Screenshot 2020-08-03 at 11.48.14.png

Screenshot 2020-08-03 at 11.48.17.png

Check block settings