IAP payments getting cancelled and declined

I have published a mobile game on the Google Play Store and Apple app Store for a while now. I used codeless IAP from Unity and this works fine, when I test purchase it works and real users can buy items. Looking at the purchases in Google Play Console, I noticed a lot of purchases are cancelled or declined and sometimes its just pending until it gets cancelled. I don't know if this is normal and I don't know why this is happening. If someone could explain this to me that would be great. Thanks in advance. ![IAP image][1] [1]: /storage/temp/204276-image-2023-01-29-191920737.png