In what versions of Unity is my asset pack supposed work?

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1

I made an asset pack in Unity 2019.4
So, would the asset pack be compatible with higher versions? what about lower versions?

2

Customers will only be able to download it in Unity versions 2019.4 or newer. They can’t download it in Unity versions older than what you submitted.

It’s up to you as a publisher to make sure your asset is compatible with newer versions. Unity Hub now makes it very easy to install multiple Unity versions so you can test your asset.

You’re not required to support alpha and beta versions of Unity, but be prepared to field questions from users who still want to use your asset in those pre-release versions.