They only lay during the breeding season so if the time you had them locked in was over the winter, you won't have seen any eggs. As KsKingBee said, your breeding season is only starting up there now so it would be normal for her to have stopped laying last autumn and just be starting up again now. Rajah starting to call more and displaying a lot recently is a sign that your breeding season is getting underway.
There is a high probability that she will choose to lay somewhere secluded, if she isn't already. It would be a good idea to keep an eye on her and try to find the spots she goes to during the day, especially if you see her in that stance like in KsKingBee's photo. Once she has a clutch of eggs, she might sit on them. If she decides to sit on eggs somewhere outside of a predator proof enclosure, she will be very vulnerable.
If she's hanging around one side of the garden a lot, she may have a nest somewhere in that direction. I don't know if the same goes for all peahens, especially ones who free range because that might be very different, but I know when my peahens are laying they tend to hang around near their nest, not directly beside it, but in the general area not too far from it.