You've been looking at the wrong page, I think, BMF.
I would imagine that something might be changing re the position for Commonwealth applicants. Applications from the Commonwealth stopped being processed a few months ago subject to a review of the situation. I gather that those applicants whose applications were not being taken forward at that point did receive e-mails telling them so but also saying that their details were being kept and they would be contacted if applications began to move again.
I can only imagine that you are a candidate in this group and I think that you are being invited to start the application process again.
You should go to this page and scroll down to where the different roles which are open to Commonwealth applicants are listed. You should see the one you applied for before. Click on whichever one it was and then click again on 'Request Your Application'.
Doing this should bring up the form you actually need to complete on your screen.
If you’re a Commonwealth citizen, you no longer need to be a UK resident to apply, which means a career in the Royal Navy is more accessible than ever. COVID-19 information for Commonwealth citizens: We suggest that you go to the gov.uk website...
www.royalnavy.mod.uk
