No problem. Import more third-worlders.
When elites in government, corporations, and media start their Chicken Little routine about “declining birth rates”, it’s really just propaganda for more mass immigration of cheap Third World Labor. A case in point is Elon Musk and the rest of the Silicon Valley oligarchy, who talk non-stop about shrinking populations while lobbying for more H1B coolies to come to the US so they can work for half the salary of their American counterparts.