Not possible to retrieve child pages by space from V2 API

Issue Summary

Not possible to retrieve child pages by space from V2 API

Steps to Reproduce

1. Use the V1 get content by type for space API or get content children by type API to retrieve the child pages in a space, by expanding childTypes.page
2. Attempt the same in V2 API

Expected Results

The V2 API exposes an endpoint that has the same functionality as the original V1 endpoint.

Actual Results

The V2 API only exposes endpoints in which you have to provide a page to check for child pages. There are no means to check for existing child pages in a given space.

Workaround

Continue to use the V1 endpoints, which are deprecated. This is not a valid workaround for long, since these endpoints will soon no longer be accessible.