There are 12 different Valorplates in Godfall that you can unlock. Because this is a loot driven game, you need to collect the appropriate resources to obtain these armor sets. They are not locked behind specific checkpoints within the game. You will be able to unlock them in the order you like. However, each Valorplate has it’s own requirements. Therefore, you might be able to obtain some armor sets quicker than others. But if you really want that one specific Valorplate then you can keep hoarding those resources until you can unlock it.
Once the requirements for each Valorplate are discovered, I’ll post them here. While it isn’t emphasized, I do think that some resources are only obtained in realms that you discover later on in the game. This would mean that some Valorplates are kinda soft-locked because you cannot obtain the appropriate resources just yet. But that’s speculation on my part.