@as
@Luuk Peters (Proud Nerds) suggested most of people here will be very much WP-> Umbraco , rather than Umbraco -> WP
but depending on what is installed there may be an option to usea tool like usync to generate some expor tfiles , that can then be imported or doing a db export and mapping the pages or using deplo
https://docs.umbraco.com/umbraco-deploy/deployment-workflow/import-export but i ts almost certainly a custom process