Or she is there for flashbacks or just mean, we as in the whole cast.

Anyway, Max is alive but we dont know if her body will survive, like if Vecna dies will she die with him in his mind or will she be able to escape.

Or maybe she did die, but stayed with them till the end of filming, just because she’s a major cast member and to watch and give emotional support. Also, as @PresidentSmith609 said, maybe for flashbacks.

And I think she was talking about the cast as a whole finishing up filming, not just her in specific.

Yeah I hope Max doesn't die but this isn't substantial evidence of anything except Sadie Sink was present on the last day of filming.