Here are the steps to uninstall the Plobal Apps Mobile Application App from your Shopify Store:
Go to the Shopify Admin Panel.
2. Go to Settings.
3. Open Sales Channel
4. Click on delete option
5. Let us know why you want to uninstall and remove the sales channel.
6. Once done. please unpublish your apps from Google Playstore & Apple App store too. Help article.
Hope this helps :)