I have the same problem with 2 sites: bvmarket.eu and labussola2012.it
I accidentally disconnected jetpack fot this 2 sites in the network multisite options and I lost stats.
How I can resolve?
Same problem on my network wordpress install, cookie-policy page created only in the primary blog and not created on the sub blogs. I tried also to save settings for each subblog for autocreate the cookie-policy page but nothing done.
By the way the plugin works properly for all subblog.
I suggest only to add the setting for disable the functionality of UK Cookie Consent, so is possible to enable it only for the sites of the wordpress network that really use cookies and disable for the others.