Having to build local alternatives probably had a positive impact on China's software industry. We're at a point today that major Chinese software/tech companies are routinely talked about on nightly news.
India banning TikTok did not have the same effect on the Indian software market [1]. The local competitors that cropped up were mostly disappointing and didn't outcompete YT/Instagram.
Similarly, the benefits of Sweden banning Signal would most likely accrue to WhatsApp, not any indigenous software company.
China has a user base that could make any app insanely popular. In the single country. Not to mention that EU has less people, EU is also very diverse culturally and the gap keeps widen.
