Github CI coverage data missing for package:objective_c

This is from the coverage step of the workflow on a PR: https://coveralls.io/builds/67179524
This is the overall result you get if you click on a coverage badge: https://coveralls.io/builds/67179061

Note that objective_c_tests is missing from the Subprojects list, and if you expand the source tree, pkgs/objective_c/lib/src/ns_data.dart is uncovered. Seems that coveralls is just dropping the objective_c subproject.

Start with the coverage step of the workflow and compare the Coveralls builds 67179524 and 67179061. Check why objective_c_tests is absent from the Subprojects list and why pkgs/objective_c/lib/src/ns_data.dart is reported uncovered; done means the objective_c subproject and its coverage appear correctly in Coveralls.

Written by the indexing model from the issue text.