Google confirmed Page Speed update today July 9th 2018. According to google central blog page speed update is rolling out again.
This update is now being released to all users.
It will affect the mobile search rankings for slow sites on the internet. So finally Google confirmed page speed will be a ranking factor for mobile searches.
If your mobile pages are loading slowly in the mobile, if you have a great content, your pages may still rank high.
So you can check your mobile page speed for your websites and make your mobile pages fast with the developers help.
Check your mobile speed insights here Page speed insights.