Access to privately held data is needed a timely manner, ideally without data sharing agreements (DSAs) which usually take too long to negotiate.  Urgent and ongoing real-time access to this data, is required.  While the private sector has some incentives to share data--such as corporate goodwill--they are under no obligations to do so, if it does not serve shareholder interests; and there aren't any governing frameworks to make the process efficient, aside from DSAs or contracts in general.
What is contact tracing and how does it work?  GPS or peer to peer?  Who makes the applications? Who has evaluated the sufficiency of privacy in contact tracing?  Is the data-deidentified?  Is it geographically abstracted to a the postal forwarding service area (FSA)? What would be shared with public health and are there any ethical implications in the use of this Real World Evidence (RWE)?  Is the data reliable or evidence grade?