How to make custom menu items in wordpress admin?

Question

WordPress

Good evening.
I already gave this question 5 minutes ago, then I sort of found a solution, but it turned out to be wrong.
You need to implement the following joxi.ru/D2PKxjXidJng8m
The client will have 100500 entries on the site, and it will be possible to filter them by title, headings, etc. and etc.
But there was an idea to fit all the headings to the left, to do it by analogy with Records.
That is, we have:
Posts
- All Posts
- Add new
- Categories
- Tags
And you need:
Events
- All events
- Add new
Yes, you can do it manually like here
Is there any simpler solution? Or is it all hands-on?

Answer 1

Handles via wordpress api

Answer 2

ACF pro version