Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Word for the web provides very limited customization options.
What you can do is format a text range in the desired font and then update the Normal style to match the selection.
Also, you can send feedback from within Word for the web using Help > Feedback. Or you can post in the public feedback portal at https://feedbackportal.microsoft.com/feedback/forum/fb6d67e3-301c-ec11-b6e7-0022481f8472.