Trying to deposit ETH

Noob here. Trying to deposit ETH on to Bybit exchange from ledger. The exchange gives me an “arbitrum” address to deposit (other options available as well like optimism., zkSync and ERC20). However, as I remember, arbitrum is a ?side chain and requires some kind of bridging prior to sending ETH on it?? I don’t use ethereum very frequently so have no idea. So not sure if it’s safe to send.