Can not comment on TikTok live videos from iPad Air 5

Hello amyleaw,

If you're experiencing this issue only with this specific app we recommend following the guidance listed in the following support article. It will assist you in isolating and potentially resolving this behavior: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

If the behavior persists we recommend contacting the app developer directly: How to contact an app developer - Apple Support

"Contact the developer of an iOS, iPadOS, or watchOS app

1. Open the App Store on your iPhone or iPad.
2. Search for the app, then tap it. If you can't find it, tap the account button  or your photo at the top of the screen, tap Purchased, tap "Not on this [device]," then tap the app.
3. The app's product page appears. Scroll to the Ratings & Reviews section, then tap App Support. If you don't see App Support, make sure that you're signed in with the correct Apple ID."

Regards.