What you can do is find the ecosystem projects of Layer 1 and Layer 2. If you found a layer one project, it will launch a token with the mainnet launch. If you found a layer 2 project, it will launch a token after some time of the mainnet launch. I will share a list of projects, you can try out.
Eg: Zksync , Starknet , SEI , Layerzero , PolygonZKEVM , Venom , Berachain , Aptos
that's good list but sei is in preparation to launch its own coin. I just hear that if the calculation for airdrop will be based on how many points being collected by its test net participants. The amounts allocated for airdrop is also pretty small at this moment.
Im thinknig about if sei already ended its testnet through blocked.