If it’s a normal dinner than I expect to provide everything as the host.
BUT for Thanksgiving and Christmas our immediate extended family (mom, sister, brother, and their spouses and kids) each family brings stuff. They are big holiday meals. One of the local siblings will supply their house as the meeting spot but we wouldn’t expect her to shoulder all the work and costs of the meals too. They aren’t “her Thanksgiving meal”, it’s “the Doe Family Thanksgiving” if that makes sense.
This, exactly. I entertain a lot. And usually provide everything myself - which costs a lot and takes a lot of work.
However, for a large family holiday gathering and with the expensive nature of Thanksgiving dishes I think potluck style is the way to go in that case. The perk of doing it this was is that the family can afford to get together more if the burdens are shared.