The final planet in your journey through Destiny 2 is Io. This Destiny 2 Lost Sectors Guide – Io will tell you how to find each of the different Lost Sectors on the planet Io as well as information on how to get inside and where to find the entrance.
As with previous planet Lost Sectors, once found you must venture inside, take down the boss of the Lost Sector and claim the code to open the chest. The chests contain various rewards but are usually a single Emblem for that planet and some additional items such a reputation items.
Below is a list of the Lost Sectors on Io and accompanying screenshots showing map location and entrance.