.mem and .wasm MIME type errors in Azure only - reactjs

Question

This app was built in Visual Studio 2022 using the "ASP.NET Core with React.js" project template. In a nutshell this template sets up a React front-end that lives in the same project with a .NET6 Web API backend. A proxy config file defines routes that will be sent to the API, all others default to the React app. It's a clever setup and is working well except for one recent problem.
When I run the app locally at localhost:3000 everything works flawlessly.
I created a publish profile in VS2022 to publish directly to Azure as an app service. The publish is always successful. I can browse the app in Azure and the React UI loads without issues. There is one button in the app that triggers a 3rd party library called PDFTron to load an Excel file and preview it in the page. Running locally this works perfectly. Running in Azure I get a series of errors and the Excel preview never loads:
I'm using a 3rd party library called PDFTron for displaying an Excel file in the page.
Things I've tried:
PDFTron has an article listing the MIME types that need to be enabled. Since I'm haivng no problem running locally I assume they're already enabled by default in my local VS2022 environment. In azure I manually edited the published web.config as follows:
<system.webServer>
<handlers>
<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
</handlers>
<aspNetCore processPath="dotnet" arguments=".\DocuParseWebApp.dll" stdoutLogEnabled="false" stdoutLogFile="\\?\%home%\LogFiles\stdout" hostingModel="inprocess" />
<staticContent>
<mimeMap fileExtension=".xod" mimeType="application/octet-stream" />
<mimeMap fileExtension=".res" mimeType="application/octet-stream" />
<mimeMap fileExtension=".mem" mimeType="application/octet-stream" />
<mimeMap fileExtension=".wasm" mimeType="application/application/wasm" />
</staticContent>
</system.webServer>
Unfortunately this had no effect.
My Program.cs file:
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.MapControllerRoute(
name: "default",
pattern: "{controller}/{action=Index}/{id?}");
app.MapFallbackToFile("index.html"); ;
app.Run();
Are there any additional steps to configure an App Service in Azure to work with these MIME types?