Staking of bitcoin address is used to let people know that a bitcoin address belongs to you as you are able to sign a message using the address private key.

What are needed are your bitcoin address, your message (include the date that you are signing the message). Then click on sign to let the wallet generate the signature for you.

Then paste your bitcoin address, the message and the signature on this thread.

You can use Electrum, Bluewallet, Sparrow...