Available app updates are not showing in App Store->Updates

Recenlty, I noticed that I'm not geeting any updates for existing apps in my MacBook Pro. I was using MacOS 12.6.1 and I noticed that one of my app was not working properly. Then, I checked that app in App Store and it was showing an update is available but the same thing is not showing in App Store->Updates. I upgraded my MacOS to 12.6.2 and then 13.1 too. But the problem is still persistent. I have checked few apps individually like Pages, Numbers, iMovies, Keynotes etc. on App Store and I found that updates are available but these updates not showing in App Store->Updates. Please help me.