site deleted accidentally from lightsail.

According to the following documentation, it seemed possible to restore data if a snapshot was available. [1] [2]

[1] Deleting an Amazon Lightsail instance | Lightsail Documentation
https://lightsail.aws.amazon.com/ls/docs/en_us/articles/delete-an-amazon-lightsail-instance
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Deleted instances cannot be recovered. Create a snapshot of an instance before deleting if you might need the data in the instance at a later time.
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[2] Deleting snapshots in Amazon Lightsail | Lightsail Documentation
https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-deleting-snapshots
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This is a permanent operation and can't be undone. You will lose all data on the snapshot when you delete it.
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If there is a backup of the data in the local environment or elsewhere, it may be possible to restore it, but if there is no backup, it will not be possible.