Upgrading early access bundle (PS5)

So I was under the impression that you can upgrade your early access bundle, so I ended up buying just the early access and now would like to upgrade to Thaumaturge of the Vaal Supporter Pack, However I can't upgrade on PS5 and can't find how on here... at least without paying full price.
Is it possible to upgrade to higher bundles tiers with the cost of previous bought bundle tiers removed? Thanks.