Is it possible to configure the footer in a Modern SharePoint site with the help of Site Script and Site Design?
It is not available yet. Check the image below from SPC 2019, in the right hand side under SetSiteBranding heading, you will find
Footer Visibility action.
I checked the latest schema and right now its not available, but other capabilities like Header layout, background and Navigation visibility are available.
So, would expect the Footer visibility action to be available pretty soon.
Keep checking - Site design JSON schema this link.
As an alternative for now, you can trigger a flow which will call an Azure function which provisions the footer using the PnP Provisioning engine.
Site footers are current supported only in modern pages of communication sites. This feature is rolled out to Targeted Release (entire organization) customers and will GA in the Q3 CY2019 timeframe.
Currently, we can configure it with PnP PowerShell:
Connect-PnPOnline -Url "<SiteURL>" –Credentials (Get-Credential) $web = Get-PnPWeb $web.FooterEnabled = $false $web.Update() Invoke-PnPQuery