Can level 2 mined coins take part in staking?
No, you need to be able to transfer MNE for that. Only with Genesis Address Level 3
He ask can he use already mined tokens from genesis level 2 address for staking, and I would answer like this - yes, previously mined tokens can be used, only first you need update address to level 3.
saying yes it's a lie , right now in his state the answer is NO , you can't untill you uupgrade to Level 3 your Genesis Address ....