How to request post-purchase extensions access from the new Dev Dashboard (no legacy Partner Dashboard)?

My organization was created directly in the new Dev Dashboard (dev.shopify.com), so there is no legacy Partner Dashboard and no “API access” section with the “Access post-purchase extensions” card described in the docs (Build a post-purchase product offer, Step 6). My app already has a working post-purchase extension on a development store and public (App Store) distribution selected. Where do Dev Dashboard organizations request post-purchase access for live stores now? Or is it granted as part of the App Store review submission for new apps?