How long is staked ETH locked?

Could you please elaborate on the duration of locked staked ETH? I'm curious about the time frame involved in this process. Is it a fixed period, or does it vary based on certain conditions? Additionally, what happens to the staked ETH once the locking period ends? Does it automatically become available for trading or withdrawal, or does it require further action? I'm interested in understanding the intricacies of this staking mechanism and how it affects the overall cryptocurrency ecosystem. Thank you for your insights.