hmm .. only applies to entires to our homepage .. and no referrer It's across all domains (ips) inc those assigned to larger service providers (ie unlikely to be bots).  Whilst it's also possible these may be new device purchases it does seem highly unlikely with uniques on mobile almost double

Yes, I'd based on a significant proportion of our audience using Safari being iOS users.See below ...Interestingly increase in Uniques only applies if Safari AND iOS, however more importantly (my previous point) it should have not impacted third party omtrdc.net cookie as it was already being blocke...

We are using omtrdc.net which in theory should not have had an impact as these cookies were already being blocked.  However I've noted a sizable increase in Unique Visitors across all iOS devices.  Are you aware of this and why this would be the case.

Is it possible to identify/trend no. of unique visitors relying on fallback method(s). We're currently using Adobe's third-party cookie as we need to report on uniques across multiple domains and therefore helpful to measure any impact/change.