Get horizontal scroll bar in Numbers on Mac Sequoia 15.4.1

The locations of a lot of the system settings changed dramatically in MacOS 14. Most posts, if they are not fairly recent or don't specify the OS version, will point you to where they used to be in previous OS versions.

In MacOS 15, System Settings->Appearance has setting for scroll bars. Options are:

• Automatically based on mouse or trackpad: Scroll bars are shown depending on the mouse or trackpad you’re using. If your device allows gestures, scroll bars are hidden until you start scrolling. Otherwise, they’re visible.
• When scrolling: Hide scroll bars until you start scrolling.
• Always: Scroll bars are always shown.

I set mine to always.

Or are you saying you've looked at the System Preferences->Appearance settings and the scroll bar settings are not there?

In the menu go to Apple > System Settings and search for "scroll".

You'll see a listing for "Scroll bar behavior".

As with Settings on iOS/iPadOS, often the quickest way to find things is to use search.

SG