Good morning, @ljdelo ...
Sorry that your question has been sitting here for over a month without a response. This is a pretty easy one to answer. Check out my screenshot ... which I assume is similar to what you are seeing (but maybe some different items listed):
As you can see from this image, there are actually two scroll bars...one on the very right, but then another is displayed just to the right of the External Tools names. You need to use this inner scroll bar to see the rest of the list. You could even click and drag that little three-lined triangle icon (just below the bottom right corner of the "Select" button) to expand the window even more to remove the outer scroll bar so that you only see the inner scroll bar.
I hope this will help a bit. Please let Community members know if you have any other questions about this...thanks! Take care, stay safe, and be well.