Bridging Crypto Assets between NEAR and Aurora
To add a token from your past Rainbow Bridge transfer to MetaMask on Aurora Mainnet, click 'Scan transfer history' in the Bridge and select 'Add token to MetaMask'.
To add a token manually, find the token address in the list of supported tokens. Note that they have a different address on Aurora Mainnet than on Ethereum.
$META on Aurora 0xc21ff01229e982d7c8b8691163b0a3cb8f357453
stNEAR on Aurora 0x07f9f7f963c5cd2bbffd30ccfb964be114332e30