Documentation for Adobe API Mesh reconfiguration for Adobe Commerce migration from PAAS to SAAS.

[LkKu]

Migrate to Adobe Commerce as a Cloud Service | Adobe Commerce
in the above article there is a table which mentions the changes that will be required for services when migrating from PAAS to SAAS.
For API Mesh regarding PWA storefront and Headless it is mentioned either build new mesh or reconfigure existing. I tried looking into the reconfigure part more but couldn't find anything related to it.
Can more insights be provided on what exactly will the reconfiguration look like?