Afternoon update:
I could only get 6cc syringes from vet for syringe feeding. All the pet stores near me didn't have any.
But the 6cc's seem to be worse than the only really small one I was using so I am back to the small one for now

Is there any way to oil the 6cc ones? Maybe use olive oil just to loosen the stickiness up? Might try again.
She is tough to syringe feed. I wrap a towel around her which helps but it's still tough. It is one very messy task. Some foods blend much better than others (less crumblings) I am finding as well. I find more ends up on me or the floor or towel than in her mouth sometimes.
I almost got Roo to eat one Temptation snack before as she used to love them! I think she remembers and just likes the sound of shaking the bag though. I left several out, two other ones broken into pieces. Maybe she'll eat one when I'm not looking? I've also tried tuna-fish but no avail. Also tried those fresh fancy feast snacks (salmon) which she liked smelling but wouldn't eat of course
I got some higher carb Friskies can cat before and blended one high carb and low carb wet can, so I'm trying that in the syringe feedings.
I did a relion ketone test yesterday (Monday) and it was 80/Large.
I caught her peeing this afternoon and got another and it was lower: 40/Moderate!
I hope that keeps happening! I'll try to test her ketones as much as I can catch her.
My first time doing her sub q fluids went well this morning which was a relief. She loves drinking water too, always has, and has been drinking from the bathroom sink where I've been keeping her now, so that's good. She's currently asleep in the sink in fact. Picture(s) attached. If it makes her feel better, she can sleep wherever she wants!
I did have one issue last night though - she pee'd in the bed even though I had a liter box in the room as well

I know she couldn't help it and it wasn't her fault as I think she was tired and weak and the ketones needed to come out! Was a big mess though..
She's never done that before. So I am keeping her in the bathroom, for now.
She did use the liter box in the bathroom earlier so that made me happy!
Just wish she would eat a tiny bit on her own. I worry she's just not getting enough too. I feed every few hours right now. I am going to have to go to work tomorrow too although hopefully can sneak away for a quick lunch feeding with her.
My other concern is I don't think she has pooped in a while. (maybe since Saturday or Sunday?) I know she hasn't eaten much those days but hope that doesn't worsen her problems. I always used to add Miralax and Lactulose in her wet food and didn't even think to ask, should I also put that into her syringe feedings? I am thinking I should! She hasn't had any since the last time she ate - which was Saturday I believe.
Will try and work on spreadsheet later although I am exhausted right now and have to rest a while.
Thank you for all the great responses and advice thus far!