It’s not clear what you mean by “deleted Gmail accounts”. If you mean the emails in the account, then it depends on how and when they were deleted. If you mean the account itself, then yes, it is gone forever.

If you have a recovery phone number for your account, you should be able to recover it. If not, there is no way to recover your account without the password. This issue may be resolved by resetting the password and then locking it to avoid losing access in the future.

Google account deletions are permanent due to the inability to retrieve, restore, or reconstruct a Google account. This is due to the intricate features of Gmail accounts and Google Drive storage, which cannot be fully reconstructed without a backup data restoration from Google. The deletion is irreversible and can lead to problems for users when they need access to their email or other files provided by Google services.

To recover deleted Gmail emails, you need to use a third-party recovery software. It can scan all the data on your device and find the deleted Gmail emails.

If you have a backup of your Google account, you can restore it. If not, you will need to contact Google support for help.

The best way to recover deleted emails from Gmail is to use a third-party email recovery service. Services like these will be able to scan your Gmail account and find your old emails.