Unstaking your ETH with Lido is not instant, and includes the following two steps:
Submit a withdrawal request.
Claim your ETH after fulfilment.
Your ETH will not be fully unstaked until both steps are completed.
The fulfilment process takes 1-5 days (or longer), depending on a variety of factors. To know if your ETH is ready to be claimed or not you can check its status (i.e. “Ready to claim” or “Pending”) on the Claim page.
If any of your requests are marked as “Ready to claim” with a green background, it is time for you to get your ETH back.