Worst thing is, it’s not the employer, it’s her manager
Usually the case. People don’t leave companies, they leave managers.
In this case with this amount of notice, I’d say it’s wholly unreasonable. Plenty of time for them to arrange cover if necessary.
Though we’re generally lucky in the UK or with UK companies. American companies would likely refuse two weeks and few people in America consider taking that much time off in one go.
If she’s looking to move jobs, can she go freelance? Do what you like then with holidays 😀 . I’ve not even been keeping track of mine in the last few years. I just bog off on holiday if I want. Though holidays aren’t considered holidays, they’re days of no profit. So tempting to not take any.