I mean WL actually has a framework for quests, in game events, conversation trees, NPC behaviour (with LODs), pathfinding, a sandbox with associated tooling, mini-games, combat system and so on. Saying the only difference between WL and FD is the multiplayer component seems disingenuous, one of them has actually implemented a lot of systems and all of them sit inside the original project scope of making an adult RPG.
That said simply having a large scope, or even one that grows as the project progresses, isn't scope creep. Scope creep is when you keep changing the scope without any kind of change management process or controls. WL was always going to take years to develop, changing a few things like redoing the map or switching to UE5 isn't scope creep if it's planned and managed appropriately.
The difference with FD is that FD doesn't seem to have any kind of plan, Helius has been arbitrarily flailing about doing stuff like (as I mentioned above) removing features post-implementation only to plan to reimplement them in the future. Or still changing plans for the core gameplay loop 5+ years into the project (what is it now, async card battles or something?). It's kind of insane to watch and whilst WL isn't free from criticism, I doubt any project of this type is, it's not even in the same ballpark for disorder as FD.