mobile vs desktop ranking difference

hi guys -

over the last few days, my ranking between mobile and desktop has resulted in a big gap. I am number one in mobile, but desktop ranked as 3. Because nature of our business, 70% of our searches come from desktop and almost 100% of repeat visitors come from desktop. So desktop traffic is considerably higher than mobile.

Why the difference in search result?

If the whole crap about mobile first ranking is true, then shouldn't my desktop serp also be number 1, since mobile serp is 1?

Maybe your sites mobile friendly score is higher than other websites, online tools like "Gtmetrix" and "Google PageSpeed Insights" will help you to identify and optimize if needed.