Horizontal menu / subpages

Hey there! ??

I was wondering if you could once again provide me with a bit of assistance.

Is there any way to have the “child” pages pop up directly beneath their parent-page button on the horizontal menu? Since I keep a lot of articles on tap beneath the parent pages, the way they pop up now is really messy and a bit confusing. A classic “drop-down” option would be fantastic.

Since I’m likely not explaining this well, please take a look here: https://www.hopedarbywritings.com/blog and click on “Non-Fiction”…you’ll see what I mean.

Thanks in advance for any help you can offer!

Best,
Hope