Create Modern Experience SharePoint Site

Use this PowerShell script to create a modern SharePoint site:

Install-Module SharePointPnPPowerShellOnline

# Connecting to your tenant 
Connect-PnPOnline -Url https://YourTenantName.sharepoint.com

# Creating the Modern Site

New-PnPTenantSite `
 -Title "SiteName1" `
 -Url "https://YourTenantName.sharepoint.com/sites/SiteName1" `
 -Owner "admin@YourTenantName.com" `
 -Lcid 1033 `
 -Template "STS#3" `
 -TimeZone 10 `
 -Wait
 
New-PnPTenantSite `
 -Title "SiteName2" `
 -Url "https://YourTenantName.sharepoint.com/sites/SiteName2" `
 -Owner "admin@YourTenantName.com" `
 -Lcid 1033 `
 -Template "STS#3" `
 -TimeZone 10 `
 -Wait