As staking rewards are calculated every 5 days(epoch) you are free to spend your ADA as you like and only the amount available during the epoch change will be used. Cardano natively doesn’t use locked staking.

Some Cardano DeFi dapps even let you gain staking rewards for your locked ADA while yield farming like Liqwid and Indigo Protocol.

Staking on the Cardano Blockchain is entirely liquid. That means that your coins are never locked or out of your control when they are staked. The system takes a snapshot of your holdings at a specific time each epoch and then calculates the stake based on that snapshot. At any time you are free to move your coins anywhere and the changes will be accounted for in the next snapshot.

The staking system also automatically adds the coins you have accumulated through staking so it’s a compounding mechanism as well.

Hope this helps.