It’s already banned in Afghanistan, Australia, Belgium, Canada, Taiwan, Denmark, European Union, France, India, Indonesia, Netherlands, Nepal, New Zealand, Norway, Pakistan, Somalia, and United Kingdom.
A lot of these are partial bans. Canada for example only bans it for government issued phones which makes sense, there shouldn't be any apps let alone social media apps on those devices.
Am from the Netherlands. Can confirm TikTok hasn't been blocked yet. I think the ban only applies to some government officials, and I don't think it's enforced well for most of those.