No, you have to update the setting on each Wyze Cam.
Related article: What is 60-day cloud storage?
You may be wondering, if you upgrade to Cam Unlimited Pro now, do you automatically have 60-day cloud storage enabled on all of your Wyze Cams? And, do you automatically have 60 days of recordings stored, beyond the standard 14 days?
The answer is no to both. You have to update your cloud storage to 60 days in your Account settings (Account > Video Cloud Recording > 60 days storage). The 60 days starts from when you update this setting, and doesn't have 60-days of recordings already stored.