Confusing dreams with reality & calling police

Hello all, I’m looking to see if anyone has experienced anything similar. I’m not looking for a diagnosis, but really trying to figure out if I should be pushing my mom to bring my grandma to seek potential diagnosis.

So here’s what’s up. Grandmother is 84. She’s pretty immobile. Gets up in the house only to use the restroom or get a drink. She has intense nightmares, almost every night and calls out for help. She has had 3 especially intense nightmares within the past 6 months where she called police 2 times, and my mother the 3rd time saying she was standing outside of the hospital waiting to be picked up. She will awake from dreams and see people who aren’t there. Grandmother sleeps most of the day, tends to stay up later at night but overall sleeps most of the day. Despite all the sleeping she always states she is tired.

My mother is a nurse and I really don’t know if she’s in denial or a financial thing, but every time I mention it she brushes it off and says it’s “sundowning”

Any advice here?