Stage IV breast cancer-finished 6 month treatment

Hi everyone,
Just a question about my mam! She was diagnosed out of the blue ☹️ with stage IV breast cancer, that had spread to her bones, last June.
She’s 73 and very active. She’s just finished 6 months treatment and was told initially that once that was finished, she’d have a scan and they’d work from there.
The treatment finished yesterday, she was sent home and that was it. No consultation or communication of what was to come next. I rang the hospital today to get through to the oncologist. They eventually rang Mam and said they’d do a scan next week. And that was more or less it.
It’s great to know she’s going to have the scan but I’m just anxious about what that could reveal and if it’s spread more, what does that mean? I was also annoyed that it took a phone call to find this out and be offered a scan date. I completely understand that she’s not the only one and they are so busy but it’s tough not to have any one to one communication when she’s there having treatment.
I’d love to chat to someone who knows the ins and outs.
Sorry it’s my first post and I haven’t even read through any other threads. I’m at a loose end for her as she means the world to me and especially my daughter, who she has looked after every day since she was born.