This Pop-Up is very handy as it tells whether the phone is charging properly or not.
But, Sometimes, we accidentally click on 'Do not show again.' Option, which disables it completely.
Although, You can't get the same Pop-Up again, but there is a way to get this in the Notification Panal, without any third party app.
Here's how to do this😁
This will alert you every time when the device is charging slowly, as a Notification Pop-Up, Same as other apps, like WhatsApp, etc.
Hope this will Help those who wanted this for long.😁