Wait... nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm, from this pic, does this mean that, similar to having a lot of address from a bitcoin hd wallet from the 12 seed words, I can have the same number of key pairs for nostr?

Please elaborate more if possible.