Can you add Aptos to MetaMask?
Aptos runs the Move VM, not the EVM, so MetaMask cannot connect to it directly.
Why it does not work
There is no Ethereum-compatible RPC to add. Some bridges expose EVM-style wrappers, but the base chain is not EVM.
Search results promising a “Aptos RPC for MetaMask” are either describing a bridged wrapper token on an EVM chain, or they are simply wrong. There is no setting to change.
What to use instead
If you already sent funds to the wrong address
Funds sent across incompatible networks are generally unrecoverable, because no one holds the key to that address on that chain. The one exception is a deposit to an exchange: exchanges sometimes recover wrong-network deposits for a fee, so open a support ticket with the transaction hash before doing anything else. Anyone who contacts you offering to “recover” it for an upfront payment is running a scam.