Instagram? Yes because now it’s Facebook with a different skin

TikTok I don’t think so: main problem with FB/IG is that you’ll get “friend requests” from all your family, and the algorithm is really strong on snitching you. Eventually you would need to create custom viewing permission lists (which nobody does) or stop posting stuff if you don’t want getting comments from your family. With TikTok you get videos from strangers and your videos gets shared to strangers, it’s unlikely that the algorithm pushes your stuff to your relatives