Token burning typically involves sending the tokens to a wallet that has no private key. i.e., a crypto wallet that is not in use

The wallet is in use for recieving tokens only . Transfer out function is permanently disabled because to inaccessible private keys .

The most popular technique to burn tokens is to send them to a wallet, where they will be destroyed.

Yes the same process is carried out through smart contracts these days and execute it automatically.

God luck