Why is tik tok not back in the app store?

Because it’s still technically banned, all that happened was they got another extension.

“Under federal legislation, which remains in place despite Trump’s order, companies could be fined $5,000 per user they help access TikTok. For Google and Apple, this could mean a $5,000 fine for each user who downloads or updates TikTok. For internet hosting services like Oracle, it could mean a $5,000 fine for each user that accesses TikTok using their services.” - source

Companies aren’t going to risk millions in fines. Google is free.

Name probably being changed to MetaXtok