As of August 1st 2023, Lido officially stopped support of Lido on Polkadot.
All staked tokens have been successfully unbonded, and claiming of tokens without any wait time is now possible. Deployed smart contracts remain active until the last tokens are claimed, so alternatively you can unstake via direct contract interaction, i.e. via explorer.
To unstake:
Navigate to "Contract" section.
Navigate to "Write as Proxy".
Connect with your wallet.
Claim your tokens by calling "claimForcefullyUnbonded (0xd0564dce)".
After this, you will see your unstaked DOT tokens in your wallet.