Is it possible for airdrop sites to access your funds even after disconnecting your wallet?
Is there any other way wallet can be compromised aside this mistakes?
Your problem is that, you’re under some serious phishing attack by the amount of activities you might have been doing on various sites, getting mixed up with these and that airdrop along with the meme coins and the scams that comes with it.
Your window of compromise could be your device. Although, haven’t linked your wallet to one of these airdrops creates another window of complication. My advice would be that, you dish that device for a new one, create a wallet on the new device, use all appropriate safety types and you would be good.
Also, avoid linking wallets your Bitcoin wallet with any other wallet for airdrops, it’s just not worth it.