Sure.
I would say the concern with TikTok is specific to its association with the PRC. As mentioned here, TikTok collects a lot of personal data and has access to a lot of personal data on your device. CSIS has been very publicly warning about the risks of using TikTok. It's very clear that there's a strategy on the part of the PRC to collect big data and personal data from all around the world.
The PRC is also the primary threat actor in Canada connected to foreign interference. When you have a vast amount of collected personal data and on top of that have AI and machine learning that you can use to sort through that data and use it against people, you can use it for foreign interference, to target individuals, for cyber-attacks, to intimidate, to influence and to compromise in the future.
Really, the concern is the vast access that TikTok allows to personal data and the fact that the PRC's national security laws would compel it to share that data.