Let’s talk about dementia please...what is going on?

I hear you about NOT wanting to watch our moms (or other LOs) decline down and down. I HATE it.

Krislzreal, Your expression of such extreme grief concerns me and I will ask you to know when you need help of clergy or a licensed social worker who deals with life change issues to help you walk the awful walk you are on. Also know that there are things to read out there that may help you. Start with Oliver Sacks essays on dementia, and on injured minds. He spent his entire life on study of impaired minds and came at the end to a sort of peace with knowing that their minds are still THERE, they are just DIFFERENT in a way we cannot identify with.
I am so sorry. Stick around. There are many here in every single stage from shock to despair to desperation to curiosity, in every stage of caring and learning and throwing hands up into the air. There are so many. When you drive down the streets, behind the doors of any number of folks are those dealing with all of this in one way or the other.
Hugs out to you. Take it a day at a time. Try not to jump ahead and address everything. Allow yourself to storm, to grieve, to go into a fetal positions with depression. Then get up, do something you love, walk, talk, learn. Wishing you so much luck.

I'm sorry, this must be very hard for you.

Er... how far have you got?! You've clearly recognised that your mother has dementia, but what about scans, tests, diagnoses and the rest of it? Are you working with her doctors, have you been given information about what to expect and where to find resources?

If your mother has not been examined by a doctor recently, take her to one as soon as possible. Having dementia does not stop you having other things wrong with you, and she needs checking out thoroughly.

If you're looking for explanations of the effects of the dementia, alz.org is a good start - lots of diagrams and subject headings.

Repetitive questioning is just one of the common challenges, but boy! is it a challenge. Teepa Snow, occupational therapist and dementia guru, has videos online which many people have found both enlightening and of practical help.

What is possibly going on, in the roughest of layman's sketches, is that your mother's hippocampus is... buggered, I believe is the technical term. Imagine an etch-a-sketch that got wiped automatically every few seconds. That's her short-term memory, unable to retain information for long enough to process it.

Sometimes they simply don't remember they have already asked.
Sometimes it is what I call a verbal tic, the brain gets stuck in a loop kind of like when a record plays the same spot over and over (if you're old enough to get that reference). Often that is a sign of anxiety or some unmet need that they can't express, filling that need can be helpful but figuring out what it is can take patience and a lot of detective work.

https://www.agingcare.com/articles/respond-when-dementia-causes-elder-to-repeat-150912.htm

With little to no information or background in your post, it’s impossible for us to offer any opinions or ideas. How long since Mom has seen her doctor? She needs to be seen and evaluated to determine if it’s dementia or just signs of aging.