Tiktok "shadow" app undeletable on iPhone 12

Friend sent a Tiktok to me. Normally it opens in Safari as I never downloaded the app. This time, it opened in what appeared to be the Tiktok app. Definitely not in safari, and when I entered multitasking I saw it was completely separate from the Messages app. I pulled down my search bar and found no trace of Tiktok. I entered the app library and when I scrolled to "T", there was no Tiktok either. However, when I search for it in the app library, it inexplicably appears. Unlike the rest of the apps listed in the library which actually belong on my phone, when I dragged Tiktok onto my homepage it simply vanishes, leaving me unable to delete it. I cannot find any way to delete an app directly from the app library. Any help is appreciated, mad that Tiktok found its way onto my phone and madder than **** there isn't a way for me to get rid of it. Can't even understand how an app that my software claims isn't on my phone can show up in multitasking.

Edit: I can find the app in the app library after "z" and "#" there is an nondescript box category that this version of the tiktok app appears in. Still cannot rid myself of it.