.Net Core 3.2 Controller, using route and HttpGet attribute with CreatedAtRoute

I'm sort of fuzzy on this here. So I have a HttpPost operation that ends with return Ok(result). I remember reading that I have to add a route to GetOrder in order for CreatedAtRoute to work. I sort of did something stupid and named that api GetAdminOrders so I can secure it with JWT, but added a Route decorator to it so CreatedAtRoute would work.

var result = CreatedAtRoute("GetOrder", new { order.Id }, order);
return Ok(result);

So this didn't work, it didn't return the order back to the client making the call. I just need the order number or Id of the order and not the whole order. Now I'm wondering if I should refactor all of these that I created. I'm really wondering if I got this all wrong here.

[HttpGet("GetAdminOrder/{orderId}"), Authorize(AuthenticationSchemes = AuthSchemes, Policy = AuthPolicies.Admin)]
[Route("{orderId}", Name = "GetOrder")]        
public async Task<GetAdminOrder> GetAdminOrder(string orderId)