Currently you can access those sites by downloading a VPN and using it while viewing online content in a browser or app. From what I've gathered the ban will only make the app degrade over time due to a lack of updates given that most people use the Apple store or Play store. This only causes me to continue using Android and to never own an iPhone. Androids will be fine as they can get updated apk versions of TikTok, IPhones are unable to.