if by wrapped on l2 you mean you are holding wETH, you can swap it on opensea easily enough.

If you mean you have eth on an l2, you best bet is to type your address into etherscan and look at the multichain lookup feature, and it’ll tell you the chain

Best in class security is a gnosis wallet vault, and hold a stake derivative there. Coinbase eth is a thing, but also Rocketpool Eth (rETH) Swell eth (sweth) etc