The thing with web design is that there's so many softwares and services available to people right now that allows them to build a website even without knowing how to code. There are multiple website builders for that as well. I am not a tech whiz and I don't know any coding language but I was still able to create a free website at https://hpage.com which is a website builder and I have been creating my websites with them for years now. All I had to do is pick out a web design from their platform and add in additional content and make some changes a bit.
If she's really into web design, I suggest, she can do it as a side hustle. If coding interests her, the money making skills in coding lies in backend development such as learning PHP, Java, etc.