Is it neccessary to upload app on playstore for showing unity ads?

My unity ads are not showing, so i just wanted to ask if uploading app on playstore is required for showing it.

No unity ads show ads even if app is not in playstore

can you suggest any reason for ads not showing, i have got few request but no impression

Well it depends on many factors like fill rate, invalid traffic, Niche. You have to increase your user base. For more information you have to contact Unity ads contact support

Also give it a few days, it usually takes some time.

No, it is not necessary you can show adds without uploading it to play console