Get Posts from REST API with query parameter

Filtering of WordPress core REST responses was removed in WordPress 4.7. The feature can be added back with this unmaintained plugin, which follows this format for meta queries and may require filtering query_vars.

See https://developer.ww.wp.xz.cn/rest-api/frequently-asked-questions/#what-happened-to-the-filter-query-parameter.

Alternatively, you can filter the queries for the REST responses using the pre_get_posts action, which passes the WP_Query $query object by reference (see this article; check the REST_REQUEST constant, or hook to rest_api_init), or by writing a custom endpoint.

This is really only tangentially related to Pods in that Pods provides a checkbox which passes true or false to the show_in_rest parameter of register_post_type().