Boy you sure need to be counting your blessings here. I can only guess these things aren't mentioned because your loved one no longer remembers them, or they are just so happy to be somewhere where they are now being well taken care of and are glad not to have any responsibilities any more. Either way, enjoy the blessing of that.
The key phrase here is "advanced dementia." Once something is out of sight, it's often out of mind, especially a recent memory.
Mom forgot Dad within three months of his death, went back to high school and took up with her boyfriend from 1944 (even though he died in 2009), and occasionally mentioned our cat that died in 1989. There was no mention of the house she lived in for 50 years and cried at leaving, and her children became mere friendly people, but nothing more.
My Mom never asked about her house or family once she was into her Dementia. IMO, they go back in time and forget the life they had. Their Longterm goes just like the short-term memory. They go back into their childhood. The brain is dying and with it memories.
My Mom was asked one time about her kids. My Mom looked at the person and said "I don't have any kids".
Perhaps your loved one was just that good at compensating for fading memory/cognition until safely in the care home; my mom's own primary doc was amazed at how well she 'covered up' her symptoms to appear 'normal.' When she was still in her home she 'pretended' to do all sorts of things almost out of 'muscle memory', like sit at her kitchen table to 'read the paper' until I realized she wasn't reading at all, but just 'going through the motions.' It's a poignant thing, but can be a blessing as they lose touch with memory (which might bring on sadness/grief/anxiety.)
Ditto to Funkygrandma59's comment. My MIL in a LTC facility doesn't talk about any of her prior life unless we bring it up. She has mild dementia and memory impairment. She stopped asking about her deceased husband this year (thankfully). At quarterly care meetings she will ask when she's "getting out" (not going home).
So much mystery about the brain, isn't there! Although my mom cries and wants to be with her late husband (died 10 years ago, after sudden illness), she never talks about him unless someone else brings up a story about him or mentions him in some way. She has stopped crying at family gatherings, announcing that it is nice to see her family but she wishes she was with him. There may be a peripheral mention of him at family gatherings, but she either doesn't notice it or pretends not to hear it. (She is skilled at not hearing or noticing anything that. might be upsetting to her.)
Mom forgot Dad within three months of his death, went back to high school and took up with her boyfriend from 1944 (even though he died in 2009), and occasionally mentioned our cat that died in 1989. There was no mention of the house she lived in for 50 years and cried at leaving, and her children became mere friendly people, but nothing more.
My Mom was asked one time about her kids. My Mom looked at the person and said "I don't have any kids".
Although my mom cries and wants to be with her late husband (died 10 years ago, after sudden illness), she never talks about him unless someone else brings up a story about him or mentions him in some way.
She has stopped crying at family gatherings, announcing that it is nice to see her family but she wishes she was with him.
There may be a peripheral mention of him at family gatherings, but she either doesn't notice it or pretends not to hear it. (She is skilled at not hearing or noticing anything that. might be upsetting to her.)