China, sure. India, I am not so sure. All the popular social media platforms(except TikTok) in India are US based. English being the gateway language for most of the influential users, makes it trivial for platforms made in US to capture market there. Also, US has much more cultural exports to the country than China. There is no advantage a Chinese clone startup would have over a US one in India unless the product is vastly superior; this is why even Chinese firms are investing in Indian startups rather than entering into the market directly.

Hardware, they might dominate but for that to happen they need to have a solid alternative to the US based services.