sending it to an inaccessible wallet or a null address to be brunt.

Yes as these wallets have only public address , only tokens can be transferred to them . As they don't have any private key , no transfer out transaction can be made .

Some Projects adopt the automatic burn approach, which burns a fraction of the asset during transactions as part of the gas fee paid. An instance of this is seen on Ethereum.

Yes Etherium is a classical example. In addition there is BEP 95 mechanism of burning in Binance which burns a portion of BNB after creation of every block . There is also quarterly burn and auto burn mechanism in Binance as well.

Good luck