The thing I was aiming for
The problem

My first time posting here, so sorry for any inconvenience.
Also I’m far from expert in CSS all I know is how to find things online and I have knowledge on computers so I can usually find answers and learn quickly how to solve problems but this was a struggle. First to find the code in Shopify then to learn what de-minify means and then to find this in Visual studio and first it was a loooong (about 60 items) dropdown menu.

Any help would be greatly appreciated
PS please try to explain this like you would to a 10y/o child. Thanks

I fond out how to make it restricted and scroll by adding:

max-height: 200px;
overflow-y: scroll;

before the ‘scroll’ line the menu would have menu in it so it would be a dropdown that could extend horizontally but after I added this I came across another problem where scroll would go horizontally too and I don’t know what to do from this point.