This can be difficult if using the IOS app only, since some of the tools you have available on a browser to inspect content are not available for the IOS app. Note that domains may not "logically make sense."
You can try opening the Bloomberg site on a browser and using the tools in this FAQ to help you determine where the content is being blocked.
As an example, DNSThingy extension on the Chrome browser shows the following domains loading when opening www.bloomberg.com in the browser:
* bloomberg.com
* www.bloomberg.com
* assets.bwbx.io
* www.googletagmanager.com
* login.bloomberg.com
* location.bloomberg.com
* personalization.bloomberg.com
* js.spotx.tv
* cdn.gotraffic.net