'How to use Azure App Services domain for Static Web Apps?

I have an Azure App Services instance, which by default goes to https://myappservice.azurewebsites.net (not actually mine, but it's the same format). It's not a bad domain and a lot better than the sporadic randomized domains from Static Web Apps (https://lively-tree-randomletters.azurestaticapps.net).

Is there any way to switch the serverless website running on static web apps to also use the https://myappservice.azurewebsites.net domain?

Or is the only possible solution for hosting (1) react and (2) spring boot on the same domain, to buy one? Or this isn't possible at all?

(I want them to be on the same domain so I don't need to worry about CORS)

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