Can't create app clip in Xcode 11.7?

Hello when i try to create a new target for an app clip there isn't an option of creating an app clip file. I am using Xcode 11.7 and i can't update Xcode since i am using Catalina 10.15.3. Any reason why? And what can i do?

i can't update Xcode since i am using Catalina 10.15.3.

Update your macOS to the latest version of Catalina (10.15.7?), and then you can install Xcode 12.3.
That's the thing i can't update Catalina. From where i could update? I can't find Catalina in App Store

I can't find Catalina in App Store

If your Mac is in a usual environment, you can find Software Update in System Preference.

Can't create app clip in Xcode 11.7?
 
 
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