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According to this post on Stack Overflow, any link on the header is not loaded, so we have to include it in the custom mount function (where we included Vuetify), so the fonts can be loaded on each mount

https://stackoverflow.com/questions/67462210/how-to-import-cdn-stylesheet-link-into-cypress-component-test-runner

It appears this does the same without too much trouble.

In the end, this is how my mount function turned out