Website shows on desktop Google, but not on mobile Google.

I have a very strange situation. My wife's website shows on the first page of Google for our 2 targeted keywords on multiple desktop computers (with both Chrome and Edge), but it is not showing on my iPhone or iPad. I tried searching with the native IOS Google app and by actually going to Google through Chrome on my iPhone and my wife's website does not show up for those same keywords.

Does anyone have any advice? This is a new problem and last I knew, the site was showing up on desktop and mobile searches. I'm glad that she is so high ranked for those keywords on desktop, but we all know that a ton of business is done on smartphones these days.

Please let me know if you need the URL.