Apps for sharepoint(In APP catalog) not showing in sharepoint

Hi karkyp 

You can use PnP PowerShell as follows:

$AppCatalogSiteURL = "Your app catalog site URL"
$AppName = "Name of your app"

Connect-PnPOnline -Url $AppCatalogSiteURL -Interactive
$App = Get-PnPApp -Scope Tenant | Where {$_.Title -eq $AppName}
 
#Remove an App from App Catalog Site
Remove-PnPApp -Identity $App.Id

If you don't remember your app names, use Get-PnPApp to list all apps first.