kristinandmike wrote:
My client has a website we built using Wix and now, only on iPhones, the Deceptive Website Warning red page comes up. We can't get rid of it, it's not showing in Google Search Console and we can't figure out why it's just on iPhones and only on this one website. Can anyone help?
Nobody here can help with this.
Follow the instructions in the displayed message:

Some reading:
https://support.google.com/chrome/answer/99020?hl=en&co=GENIE.Platform%3DDesktop
https://developers.google.com/search/docs/monitor-debug/security/social-engineering
If you have extensions or other add-ons loaded in the iPhone, and any add-on first-few-hops VPN apps or add-on security apps, remove all of those, force-restart the iPhone, and test again.
And also check the site for malware, social engineering, HTTP links, sketchy domain names, and the rest.