My fam was necessarily in denial. They just didnt understand.
I wrote a 7 page letter of my true dark feelings, emotions, experiences etc. And they all got a copy.
I heard back from each of them at their own time, within about a week. And all replies were, wow i didnt understand how bad it was, thank you for sharing, i get it now. Sort of replies.

For my mom, it took the letter, and a book recommendation, and joining me to therapy, and taking my letter to her therapist to get it. I think she finally got it when her t said (yelled), if she is telling you she is too sick to do something, that means shes too sick, stop pushing her! Then it clicked.

Good luck!
Older generations sometimes dont understand im finding.