The only different in your case will be that instead of calling Microsoft Graph, you will call your own API.
Bottomline is – there is no direct integration package yet for react. Which can also be read from the official statement on the msal-js repo:
After our current libraries are up to standards, we will begin balancing new feature requests, with new platforms such as react and node.js.
You can also use .net core instead. Please go through the sample here which can help.
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