It means you haven't lost anything.

It means your Hive-Engine tokens are now considered wrapped tokens or representations of the value of your Leo tokens, on Arbitrum, on Hive. In Leo 1.0 all of the Hive tokens bLeo, wLeo and pLeo were representations of the value of your Leo tokens on Hive, on those blockchains and the hive-engine was the native Leo token. Now in Leo 2.0, pLeo, bLeo, wLeo and he-Leo are representations of the value of Arbitrum Leo tokens. So that is the first difference.

Leo 1.0 Hive Leo is the native Leo and wLeo, bLeo, pLeo are wrapped tokens. They are all of equivalent value and 1:1 exchangeable via www.wleo.io
Leo 2.0 arbitrum Leo is the native token, and wLeo, pLeo and HE-Leo are wrapped tokens and all are of equal value, exchangeable 1:1 on www.wleo.io

Second difference is that staking arbitrum Leo on Leodex will earn you USDC tokens, not any Hive tokens. While staking your Leo tokens on Hive, as powered up Leo will earn you more Leo.

Lastly, while you can continue to power up your Leo on hive and earn more Leo, it also means you can exchange your hive engine Leo tokens 1:1 for arbitrum Leo tokens, and stake them to on www.leodex.com to earn USDC.