Recently, we launched separate URL site
m.example.com for mobile users. That was a mistake because we don't have corresponding pages on mobile for every page on the desktop version. We have fewer pages on the
m.example.com website compared to
Google started to index our mobile pages. This causes keywords for desktop to disappear. To recover from this problem we thought to put
rel=canonical but as I said we don't have all pages on mobile. Some products are not available for mobile so we don't have these pages for mobile.
I thought to make responsive version, but it would take too much time. What can I do?