In demo, scaffold the FormCustomizer using Yeoman Generator. Extend/override the BaseFormCustomizer. code and debug your Form Customizer, step through form item editing capabilities, package and deploy using PowerShell.
This PnP Community demo is taken from the Viva Connections & SharePoint Framework Bi-weekly sync call recorded on July 28, 2022.
Form customizers are SharePoint Framework components giving you an option to override the form experience in a list or library level by associating the component to the used content type.