She can do pretty much anything with a History degree.
Now is the time to start thinking about what interests and motivates her, and researching careers connected to that, then getting work experience placements, lining up summer jobs, or doing some volunteering for charities connected to her interests.
I did a similar degree. I also didn’t know what I wanted to do at that point in my degree but I knew what things interested me enough to want to explore them as possibilities. I spent my summers working with kids in a summer camp, worked part time during term time doing alumni fundraising for the university, did work experience at various arts organisations and joined lots of societies to try out different things I was interested in like journalism and theatre directing. I also kept up my foreign language A level by taking the free language classes offered, in case I wanted to work abroad.
I kept my options open, built a good CV and also a good amount of contacts so I had people to ask for advice and help, and also for references. This all meant I got a job immediately on graduation - in the Arts/Theatre industry, which I enjoyed very much, but didn’t pay very well, so I trained as a teacher eventually. I am still teaching 10+ years on and I love it. I did also work abroad so those free language classes were invaluable!
If I can give one piece of advice - once she leaves uni, she will never have access to the amount of free opportunities to educate herself and try out new hobbies and interests again - so she needs to make the most of it. Take advantage of the free language classes, the extra lectures, the Q&As with professionals, the recruitment fairs, the taster sessions and so on. Universities offer so much beyond the academics that very few students actually appreciate and make use of.