I need to download the PowerApps(canvas app) solution package(.Zip file) by using PowerApps PowerShell script or pnp script.
Anyone suggest me if it is possible.
Per my research, there is no related power apps commands to export powerapp solution, we suggest you export it manually:
https://docs.microsoft.com/en-us/power-platform/admin/powerapps-powershell#power-apps-commands