Along with anti-trust, nations should all be looking at the way these OSes are constructed.
Much of the time permissions such as Physical Activity on Android is written so that the OS will not function if you deny it, since android ten the 'deny/allow has been greyed out.
For many permissions in many apps, there is the warning that your device may not function fully if a permissionnis denied, this is constructive denial of the user's rights and absolutely deliberate.
Obviously to pursue anti-trust is about money so governments will put that first, between elections voters slide into second place on the prioroties list.