Wife has ADHD - understanding how she thinks

Been married many years. Wife has probably alway been a little like she is but, I think menopause also, its become more pronounced. Anyway, she got diagnosed and its on medication.

I try to be understanding but I have a hard time. Few of the things below. Want to ask really is this "normal" for someone with ADHD and how should I react.

1. She has other illnesses but still works and its not an easy job. BUT she'll come home and won't stop even if it makes her ill. I just don't get this - why not just sit down and chill a bit but she won't.

2. Constantly focusing on "something". Any old crap. Shes never off her phone. 11pm at night she'll be showing me something shes seen to buy for the kitched. I just jeez its late just switch off a little.

3. Focuses on crap stuff. I've had whole conversations about, for example, plans for, say, Saturday night. Then I'll mention Saturday and she'll be like "oh we're doing something saturday?" and I'll think jeez we had a 10 min conversation. Its as if she switched off. But then she'll have focused on and found the exact best cat food for the cat. I just think get the basics right first before you worry about other stuff.

I really want to be understanding but sometimes I just get so annoyed.