SignInAsync function isn't attaching cookie to client browser

I've been trying to create a Cookie-based authentication for the server side of my Blazor Auto application. As of right now, the user enters their details into a login table, the details are then sent to a controller which then uses an Auth service that creates claims and calls the SignInAsync method to create the cookie and give it to the client.

My controller method is:

public async Task<ActionResult<string>> Login(UserDto request){    bool loginStatus = await serverAuthService.LoginAsync(request);    if(loginStatus is false)    {        return BadRequest("Invalid");    }    return Ok("Login: " + loginStatus);    }

And the service method is:

public async Task<bool> LoginAsync(UserDto request){    var user = await context.Users.FirstOrDefaultAsync(u => u.Name == request.Name);    if (user is null)    {        return false;    }    var claims = new List<Claim>    {        new Claim(ClaimTypes.Name, user.Name),        new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),        new Claim(ClaimTypes.Role, user.Role)    };    var identity = new ClaimsIdentity(claims, "MyCookieAuth");    var principal = new ClaimsPrincipal(identity);    var authProperties = new AuthenticationProperties    {        IsPersistent = true,    };    await _httpContextAccessor.HttpContext!.SignInAsync("MyCookieAuth",        principal,        authProperties);    return true;}

My program.cs file contains a cookie policy given here:

// Add authentication services with cookie schemebuilder.Services.AddAuthentication("MyCookieAuth")    .AddCookie("MyCookieAuth", options =>    {        options.Cookie.Name = ".AspnetCore.Cookie";        options.Cookie.HttpOnly = true;        options.LoginPath = "/login";          options.ExpireTimeSpan = TimeSpan.FromMinutes(60);    });

To the best of my knowledge, I'm doing everything right. The logic flow is basically the same as the Microsoft documentation and yet when I run this and test it out, no cookie is ever attached to my client browser.

I've tried involving a custom AuthenticationStateProvider object but honestly that doesn't seem to really be relevant here.

Any suggestions?