yeah, HD keychains have been around since like, idk, 2014 or something, and it's simple to scan for them, you just generate the next 20 or so keys and monitor the mempool for the ripemd160 hash of the pubkeys from your keychain

satoshi was already gone by the time that all became commonplace, it's also a critical security element of the tech, without HD keychains you can easily lose your sats