I think it would be cool if Rabby showed unclaimed airdrops for addresses.
Phantom Wallet and Jupiter Portfolio let you see some of the airdrops your wallet qualifies for, but it's not their priority to include all airdrops. Only Drops tracks every airdrop across all major chains.
Blockscout recently added the Drops airdrop checker widget that shows the value of unclaimed airdrops on any address, powered by Drops API, to address pages on their website.
I think this would be a great feature for Rabby to have!
