Price protection comes with the cruise fare you choose, early saver vs some of the others. Your PVP can give you the specifics. We track price drops for our customers, assume the PVP would do the same, but cannot comment on it.
Lastly, since the end of Covid, travel, and specifically cruising is booming, probably hotter than ever before. The deals you used to find are far and few between, simply because they do not have to offer them to get the business. Simply supply and demand. That has to change at some point, when and to what affect, we will not know till it happens.