are you 100 percent sure I've never heard of this before..crazy
No offense, but I think you have a lot of reading and learning to do. A LOT.
You need to understand how things work, so you can have a better understanding of what is best action to do.
App like tiktok has access to some of your phone memory and data (since you install it on a mobile phone) and it knows ip address you are using to connect from a phone to that app. Makes sense?
It also knows email address you used to register account, and probably phone number if you allowed access or used it to confirm accounts.
So to avoid any tracks, you simply need to delete all app data from your phone memory (easiest to do is to reset to factory settings, but if you can 100% uninstall entire app, all micro data, you can do so without reseting entire phone), next thing you need to do is to change ip, and now, app will never know that person who just installed app, installed 60 other apps before.
However, if you use same App store email, or use same email/phone number to confirm account, then it will know that same person who is using that email address created 60 accounts before.
Basically, you just want to pretend like its a 100% new user. Imagine if you sold your phone to a new guy and he decided to create tiktok account from his home. Tiktok will never know that same device was used to create 60 other accounts, as there wont be nothing to connect him with you. So you dont have to buy a new phone just for this, you can just pretend that you sell your mobile phone to yourself, and do what you would normally do (reset phone to factory settings, new ip, new phone number, new email)
Hopefully that makes thing more clear for you, but you do need to keep learning and reading if you want to have success, as I can see that you dont understand how things works from inside. So if you want to make money fixing cars, you better learn how car works, and which parts it has etc
If you want to learn social media, better learn how apps works, how spam filters work, etc
Just use google, and any question you have, answer can probably be found on google.