@Darkhan Atymtayev - Without the link, your only option would be to upgrade to the Starter Plan for one month ($10 USD) as paid plans have access to the Trash bin.

A few things to note:

• Only the board owner will be able to restore the board, so make sure you only upgrade the user who was the board owner.
• Before you do this, you will need to remove any other users from your free plan otherwise you will need to pay for a license for each user (you can add them back to the team after you have cancelled your subscription and downgraded back to free).

More on the Trash bin here → https://help.miro.com/hc/en-us/articles/13359286699666-Trash-managementhttps://help.miro.com/hc/en-us/articles/13359286699666-Trash-management

 Sharing this screenshot too from my Free Plan team as confirmation that the board owner should be able to restore the board from the Trash once upgraded, as long as it’s within 90 days of deletion: