My mom has dementia, fell a few months back, and broke her pelvic bones. She had been in a rehabilitation center, but since out she won't walk and wears diapers. Any advice?

A person with very high support needs, poor health, lack of mobility will need a tonne of support.

Either A. Stay Home.
With 'village' helpers to their home to assist, or
B. Move Homes.
Move into a 'village' that provides assistance eg AL/NH.

If you don't want to consider option B, choose A.

Start with up to date health & physical assessments by Doctor & PT. See exactly what the needs are. Research what services exist in your area, the costs, availability etc. Put your Manager hat on & assemble your team.

Hopefully with more PT your Mother CAN walk again.. ?

But sadly at some point walking is a skill we lose. The right equipment & many hands are then needed.

How does this sound?

If you don't want to place your mother in a Skilled Nursing Facility, then be prepared to care for her 24/7 in your home yourself. Better look into getting a Hoyer lift to move her around, too, b/c trying to lift up dead weight is literally impossible. If she refuses to walk while in rehab, chances are SLIM that "In-bed exercise to keep her strong" will happen either. Dementia will create a VERY difficult situation that you can't fix, no matter how hard you try.

I highly doubt your mother is 60 years old with 'dementia' and refusing to do PT or get out of bed, wearing 'diapers' etc. It sounds to me like YOU are 60 and trying to figure out how to care for a bed bound mother who's in her 80s at least.

Speak to the social worker at the rehab SNF mom is in right now, and see what their recommendations are. You are best off going into this situation with your eyes wide open, knowing that your every waking moment will be devoted to caregiving if you bring her home. Only you can say whether or not you're equipped to do such a thing.

 
I suggest you read this 33 page booklet (a free download) which has THE best information ever about managing dementia and what to expect with an elder who's been diagnosed with it.

Understanding the Dementia Experience, by Jennifer Ghent-Fuller 
https://www.smashwords.com/books/view/210580

Jennifer is a nurse who worked for many years as an educator and counsellor for people with dementia and their families, as well as others in caring roles. She addresses the emotional and grief issues in the contexts in which they arise for families living with dementia. The reviews for her books are phenomenal b/c they are written in plain English & very easy to read/understand. Her writings have been VERY helpful for me.

The full copy of her book is available here:
https://www.amazon.com/Thoughtful-Dementia-Care-Understanding-Experience/dp/B09WN439CC/ref=sr_1_2?crid=2E7WWE9X5UFXR&keywords=jennifer+ghent+fuller+books&qid=1657468364&sprefix=jennifer+ghent%2Caps%2C631&sr=8-2

The book/article will give you a better understanding of what's in store for your mother with her dementia, and therefore, what's in store for YOU if you take her in to live with you.

Best of luck.

The short answer is to get some caregiver help to hopefuuly reverse some burnout. A challenge in itself, but crucial. Even if a couple hours relief. To keep her home, you need a multi-prong approach. In-bed exercise to keep her strong and hopefully gain confidence again to get up. Nutrition, cleanliness and movement - keeping her from getting pressure sores (and proper care if she get them), by turning her and getting an alternating air mattress overlay. Keeping her mind happy, engaged, and feeling safe. Music, TV. Visitors who love her or she is familiar with.

She’s only 60? You do realize this could go on for 30+ years, right?

From your profile:

"I am caring for my mother Lisa , who is 60 years old, living at home with age-related decline, anxiety, arthritis, broken hip, cancer, depression, diabetes, heart disease, incontinence, lung disease, mobility problems, and sleep disorder."

Is she really only 60 years old? Or is that your age? The answer will make an important difference in what guidance you are given.