Ensure your credit card isn't expired and the billing address is current in Settings > [Your Name] > Payment & Shipping .
If settings appear correct, technical glitches may be the cause. buy button for some apps grayed out - Apple Community buy button itunes not working
If your account is disabled, you may need to request reactivation through the Apple Support Site . 3. Quick Software Fixes Ensure your credit card isn't expired and the
Restrictions can prevent the buy button from appearing or being active. Open the app on your device. Tap Screen Time > Content & Privacy Restrictions . Select iTunes & App Store Purchases . Ensure In-app Purchases is set to Allow . Tap Screen Time > Content & Privacy Restrictions
Check if any are blocking specific items. 2. Verify Payment and Account Status
A non-responsive button can signal a problem with your Apple Account's billing health.
If the in the iTunes Store is not working or is greyed out, it is often due to Screen Time restrictions or unpaid billing issues . 1. Check Screen Time Restrictions