IF THE ABOVE LINKS ARE NOT WORKING THEN YOU COULD TRY IWantU APp WHIch is a TikTok 18+ Alternative
How to Download and Install?
Step 1 : Download TikTok 18+ APK from the above download link provided
Step 2 : Go to Settings>Security>Unknown Sources and enable them
Step 3: Tap on the download button and click on Install button
Step 4: Once installed, click on open and enjoy TikTok 18+ APK:)