Hello dharshith209,
We would like to see how we can help you with being unable to fast forward in the Music app. Which iOS version are you currently running? If you are not running iOS 16.4.1, please back up and update to the latest iOS, 16.4.1. The steps in this link will walk you through the process: Update your iPhone or iPad - Apple Support
"Update your iPhone or iPad wirelessly
- Back up your device using iCloud or your computer.
- Plug your device into power and connect to the internet with Wi-Fi.
- Go to Settings > General, then tap Software Update.
- If you see more than one software update option available, choose the one that you want to install.

5.Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do."
Cheers!