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add new endpoint:

/v2/dataspaces/{dataspace-name}/nodes/query:
  $ref: 'cpsQueryV2.yml#/nodesByDataspaceAndCpsPath'

nodesByDataspaceAndCpsPath:
  get:
    description: Query data nodes for all anchors of a given dataspace using CPS path
    tags:
      - cps-query
    summary: Query data nodes across all anchors
    operationId: getNodesByDataspaceAndCpsPath
    parameters:
      - $ref: 'components.yml#/components/parameters/dataspaceNameInPath'
      - $ref: 'components.yml#/components/parameters/cpsPathInQuery'
      - $ref: 'components.yml#/components/parameters/descendantsInQuery'
    responses:
      '200':
        description: OK
        content:
          application/json:
            schema:
              type: array
            examples:
              dataSample:
                $ref: 'components.yml#/components/examples/dataSample'
      '400':
        $ref: 'components.yml#/components/responses/BadRequest'
      '401':
        $ref: 'components.yml#/components/responses/Unauthorized'
      '403':
        $ref: 'components.yml#/components/responses/Forbidden'
      '500':
        $ref: 'components.yml#/components/responses/InternalServerError'
    x-codegen-request-body-name: xpath

FragmentRepositoryCpsPathQueryImpl.java

@Override
@Transactional
public List<FragmentEntity> findByCpsPath(final CpsPathQuery cpsPathQuery) {
    final StringBuilder sqlStringBuilder = new StringBuilder("SELECT * FROM FRAGMENT");
    final Map<String, Object> queryParameters = new HashMap<>();
    sqlStringBuilder.append(" WHERE xpath ~ :xpathRegex");
    final String xpathRegex = getXpathSqlRegex(cpsPathQuery);
    queryParameters.put("xpathRegex", xpathRegex);
    if (cpsPathQuery.hasLeafConditions()) {
        sqlStringBuilder.append(" AND attributes @> :leafDataAsJson\\:\\:jsonb");
        queryParameters.put("leafDataAsJson", jsonObjectMapper.asJsonString(
                cpsPathQuery.getLeavesData()));
    }

    addTextFunctionCondition(cpsPathQuery, sqlStringBuilder, queryParameters);
    final Query query = entityManager.createNativeQuery(sqlStringBuilder.toString(), FragmentEntity.class);
    setQueryParameters(query, queryParameters);
    final List<FragmentEntity> fragmentEntities = query.getResultList();
    log.debug("Fetched {} fragment entities by anchor and cps path.", fragmentEntities.size());
    return fragmentEntities;
}