You are jumbling up reserves and resources with your woeful cut and paste.
The Odysseus project at Cosmos is a relatively high grade project, with a head grade of 2.0 % as Homebrand clearly posted (actually the head grade will be a little better with AM6 now added). Please look at the planned mine, eg the DFS.
Of course the huge total resources in the area have a lower grade, but they include a huge amount of material with no current mining plans (just as your POS has a large amount of low grade resource, but you don’t thereby purport Golden Swan is low grade). If we included all the resources, then Cosmos would be a 600 kt project, but it”s not, it is currently a project for producing 160 plus kt of nickel with a head grade of over 2.0%.
There’s a short video of the project on the WSA website (as I know you find reading research challenging), and yes it shows the existing concentrator that they are upgrading.