There is no “software update” on my MacBook Pro 2015

Missredbow wrote:

So basically ur telling me I can’t download that app I wanted

You do not say what exact Mac you are using

or

what exact macOS you are currently running.

Non the less— if it were me I would try downloading directly:

https://www.webex.com/downloads.html

Downloading third-party apps isn't done through Software Update which should be in your System Preferences. From where are you trying to download the app?

Missredbow wrote:

MacBook Pro. 2015

?

Non the less— if it were me I would try downloading directly:

https://www.webex.com/downloads.html

Still an issue ?

Apps purchased from the App Store will update themselves automatically whenever an update becomes available. Some do not update automatically but notify you of an update with a red badge on the App Stores' icon in the Dock. In this case open App Store and click on the Updates option on the left sidebar.

Software Update preferences is used to update/upgrade Apple software which is not distributed or sold on the App Store.