Hello! Is there any support or planned support for REST API access in wp-now?

I tried running wp-now locally and accessing a REST API endpoint at http://localhost:8881/wp-json/wp/v2/posts/1/. The rewrite doesn't appear to work and the main blog page shows up instead of a REST endpoint. The same happens directly in the WordPress Playground:

I noticed when testing a plugin that provides a custom REST API endpoint with wp-now:

/wp-json/vip-block-data-api/v1/...

This is also not accessible. Are there any settings changes I can make to get the REST API working, or is this feature planned? I image there are lots of plugins that rely on built-in or custom API access to work properly. Thank you!