The short answer is that the CoreLocation Bar is not appearing in iOS 11.0b5 or 11.0b6.
This question falls into the problem of timeliness over Apple OS Beta releases. iOS 11.0 (as of the time of this asking) has not been released in final form to the public. As a result any and all features will be in flux until it is ultimately released.
There has been a lot of (searchable) public and developer pushback to the Core Location Blue Bar. (Often referred to in articles as the "Blue Bar of Shame")
Whether this is a change in direction for Apple from the precious 4 betas where it did appear, or a temporary adjustment is unknown. Release notes do not give guidance and there has not been any statement from Apple on the issue. Most importantly, conjecture will not do anything more than allow the individual some unnecessary "Head-Canon"
If you are a developer and have a strong opinion on the existence/removal of the bar; you need to file this through Apple's developer access to their radar system: http://bugreport.apple.com
Other than that; always use the latest versions of the SDK available, report any issues during beta phase, and wait for final release.