@kyu thanks for the heads-up on this. Would it be possible to introduce a project property filter in the new paginated search endpoint (just as is available on the issue search endpoint)?
Some of our planned app features are blocked because we are missing this feature. The only workaround that we could find would have been to use the soon-to-be-removed GET /rest/api/2/project endpoint which does support properties expansion.
The preferred solution would allow us to get a list of projects that have a certain property set (some Jira API endpoints for other entities already support this). If that’s not possible, we could implement a workaround by filtering the search result as long as it returns a requested property in the result. As mentioned in my other posts (see below) the paginated project search endpoint already returns the properties attribute but there is no way to tell the API which properties to return so it is always empty.
For further details please refer to my post in the community and the open feature request on ecosystem.atlassian.net.