For the same file types, on Share Sheet, some apps show my app and some apps don't

My app is shown on share sheet when I try sharing PDFs or Images from apps like Box, Doximity and DropBox etc. But some apps like Google Drive does not show my app on Share Sheet.

Even the "More" button or Edit actions would not show my app.  Screenshot is here: https://imgur.com/a/z94OG5l

I have necessary items listed on plist file - NSExtensionActivationSupportsFileWithMaxCount and NSExtensionActivationSupportsImageWithMaxCount

What would be the reason why some apps show and some don't? How do I fix it?

For the same file types, on Share Sheet, some apps show my app and some apps don't
 
 
Q