iPhone won’t backup

It sounds frustrating that your iPhone isn't backing up despite being connected to power, locked, and on Wi-Fi. Since you've updated your software and had this issue before, it might be helpful to try a few troubleshooting steps:

1. Ensure you have enough space in your iCloud account to back up your iPhone. You mentioned having 367.38 GB used out of 512 GB, so it seems like you have ample space available.
2. Sometimes, a simple restart can resolve temporary issues. Try restarting your iPhone and attempting the backup again.
3. You mentioned that a senior tech previously identified an issue with your iCloud account. Try signing out of iCloud on your iPhone, then sign back in. To do this, go to Settings > [Your Name] > Sign Out (at the bottom), and then sign back in.
4. Ensure that your Wi-Fi connection is stable and strong. Sometimes, a weak or intermittent Wi-Fi signal can disrupt the backup process.
5. Go to Settings > General > Transfer & Reset > Reset > Reset Network Settings. This action will reset your Wi-Fi networks and passwords, cellular settings, and VPN settings. Afterward, reconnect to your Wi-Fi and try the backup again.
6. Check if the iCloud settings are properly configured. Go to Settings > [Your Name] > iCloud and ensure that iCloud Backup is toggled on.
7. If the iCloud backup continues to fail, consider using a computer to perform a backup via iTunes (on Windows) or Finder (on Mac). Connect your iPhone to your computer, open iTunes or Finder, select your iPhone, and choose the option to create a backup.
8. If none of these steps work, it might be worth reaching out to Apple Support. They can provide more specific guidance based on your situation and might be able to diagnose any underlying issues with your device or iCloud account.

Remember, it's essential to ensure your data is backed up regularly. If needed, consider a manual backup to a computer until the issue with iCloud backup is resolved.