Hang on a minute, it says Premium for Horizon: Forbidden West. That seems suspicious. Premium isn't used for PS5 games, only PS3 and older. Newer stuff on Premium is usually a trial version. If they're changing their strategy of which type of games goes into which tier, that would not be a good evolution, to be honest.
It is just the new way they format their twitter posts:Got excited for a second about Horizon but then I remembered I have Extra and not Premium. Bastards.
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— Twitter API (@user) date
So in the picture above it is showing games that are eligible for Premium, Extra and Essential subscribers while in the picture I posted before, the Premium | Extra refers to games that will be eligible for those subscribers - it isn't saying that HFW is for Premium only.