In this case, a state is forcing platform providers to build in side-doors for domestic players. The analogue counterpart could be... Import tariffs to bolster

In this case, a state is forcing platform providers to build in side-doors for domestic players. The analogue counterpart could be... Import tariffs to bolster certain domestic companies at the expense of the middle class. Or... Subsidized production of XYZ at the expense of a real marketplace. (Recent/contemporary examples.)