Relation between CrUX, Google Search Console and iOS devices

[gbrlmtrz]

Hello! I as the title suggest I would like to know how (if at all) these three points relate when it comes to sites being ranked by Google search when it comes to CWV.

Let me start with my (probably and hopefully incorrect) assumption: when a page or origin has flagged CWV issues on Google Search Console, like in the following screenshot, it could be ranked lower in Google search compared to other results that are just as relevant to the user's query.

But at the same time, CrUX does not take data from users on iOS devices, thus potentially hurting rank for websites that are primarily being visited by iOS users.

The reason why I'm asking this is because atm we are running an internal audit on our RUM CWV solution, and some prelimiary results have found that properties that have an overwhelming majority of iOS traffic (read as more than 40-50% of all traffic comes from iOS) show some very glaring differences in metrics (mostly CLS) between our solution and CRUX, while sites with a more even distribution tend to show data with only a couple of points of difference (all this with a 28d rolling p75 average).

Regardless of the result of our internal audit, it would be great for us, and everyone who stumbles upon this issue to know how does the fact that iOS users aren't accounted into CrUX affect page ranking for properties that used mostly by iOS users.

Thanks!