We got one of these for Mom for her birthday, and she absolutely loves it!
https://www.alzstore.com/alzheimers-...utm_medium=pla
We presented it as not being real but something we thought she would get a kick out of, the perfect dog that doesn't need to be walked or fed, and wouldn't bother her allergies. At first she was a bit disparaging about her "fake dog." Then she said it confused her a little, and I think this was in terms of it seeming somewhat real although she knew it wasn't. Now she totally loves it, carries it around, pets it and talks to it. She hears it call her "Mrs. Rugosa," which is a bit weird since it only says "woof woof," but the important thing is that she loves it and it seems to be bringing her a lot of joy.
We also got her a Viewclix device with more mixed results:
https://www.viewclix.com/
She enjoys seeing the pictures we post to it, but she doesn't like leaving it on all the time, and my theory is that the constant visual stimulation is distracting for her. Unfortunately, if she turns it off or unplugs it, I cannot use the "drop in" video call feature, which I was hoping to have as a backup if she leaves the phone off the hook, which happens sometimes. I also noticed that she has Alexa unplugged too. So in terms of assistive technology, we have one clear winner, one mixed, and Alexa is a complete failure.