When integrating with Uncoil, Uncoil’s tracking is only added to the new ads that are created AFTER the integration is completed. The reason it’s done this way is because adding tracking to already existing ads ("old" ads) would send those ads into review on Facebook which could affect their performance (ex. ads not being approved, ads not reaching same performance level after being approved).
Uncoil is still able to provide insights on already existing ads based on Facebook data, including spend, gross profit, revenue, an so on.
Any new ads created after integrating with Uncoil, will automatically include tracking code and will include product attribution insights.