https://www.yeshiva.co/ask/2710&sa=U&ved=2ahUKEwjSrcCg-_fzAhWkhf0HHTwNDacQFnoECAIQAQ&usg=AOvVaw0Y8IqURJICpddyXd1Lz61h this number (in the question in the link) and the number you mentioned in the response to my mashiah question?

Yes, for the kabbalistic concept of 600,000 souls represents the Nation of Israel, and that's the topic in discussion, the national redemption of Israel, and subsequently, the world. See for example Shulchan Aruch Or. Ch. 224, that when one sees 600,000 Jews in one place he makes a special blessing.