I have launched the bitcoin node and synchronized it. The issue is that importing the private key forces the node to scan the blockchain for the operations with the key. Is there a way to import the key in a fast way?
I don't believe it is actually possible to "sweep" into Bitcoin Core like is possible with Electrum and other 3rd party wallets. Core requires importing the key and scanning against transaction history from 2009. I'm beginning to think that for old BIP32 and BIP39 seeds it's the only way to recover coins. It might take hours/days to scan.