This is probably one of the most Cosmere novels in the Cosmere that Sanderson has written. The Cosmere is the grander universe where most of his universe connects and this one relies heavily on it. Introducing some new, exotic characters and some deeper evolution this breathes new life into the Wax and Wayne series. Combined with the fascinating setting of Scadrial, the world of Mistborn, with all it's unique magic and some of the mysteries opened by the last book, this is one incredible ride.
For a full review, check out my blog: strakul.blogspot.com/2023/04/book-review-lost-metal-by-brandon.html