No, Keystore didn't create your Arbitrum wallet—it's part of MetaMask (or whatever EVM-compatible wallet you used). When you bridge from Hive Engine, you enter your MetaMask Arbitrum address as the receiver; the bridge sends native LEO directly there. If it's your first time on Arbitrum, just switch networks in MetaMask (RPC: https://arb1.arbitrum.io/rpc).
Take your time processing—it's a lot. For staking the 5.66 LEO:
On https://leodex.io/leo, connect MetaMask (Arbitrum network).
Click "Stake LEO", enter amount, approve, then stake—gets you sLEO for USDC rewards (harvest daily, no lockup).
If issues, check Arbitrum balance (add ~$5 ETH for gas via bridge like official.arbiscan.io). Source: 
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RE: LeoThread 2026-01-01 15-57