desmond wrote:It depends on a few things, if you Google around you'll get some things to try, including "Hide Updates" on the app store page, disabling app store updates and notifications, and so on.
https://www.macworld.co.uk/how-to/mac-s ... s-3681778/
Here's a proper way for Mojave notifications, that should likely still work:
To expand on this, the UAD page on Catalina (in)compatibility gives a good clear guide on how to turn off updates in Mojave.
https://help.uaudio.com/hc/en-us/articl ... ility-Info