I have the same issue, but on Xbox. When Bungie said this would be treated as an expansion rather than a season (in terms of needing to buy it on multiple platforms) I was actually excited because it meant my son could play the content too since expansions are shared across all accounts on the home console. Turns out he can’t, so we’re pretty bummed and feel a bit mislead tbh. Bungie, if you’re going to charge on each platform as an expansion, you should let it be shared like an expansion.