welcome @qazikamranhaider334,
Start from here:
How to ask a question?
The approval is granted when the app is checked by Kodular staff which means every approval request is checked by “Humans” and not bots (except Mika) and therefore it takes time to react to an approval. Also, there are many factors which affect your approval like if your approval message is clear and straight to the point and everything there is true, chances increase that your approval will be reacted fast.
So manage your time accordingly