Here is a thread relating to Google ads metics and conversion delats see
my comment a bit further below.
https://experienceleaguecommunities.adobe.com/t5/adobe-analytics-questions/delta-between-adobe-analytics-and-google-dcm-floodlight/m-p/429444#M34935
Basically Google ads report metrics can be influenced by not only real
users but bots, multiple redirections, and tagging/browser settings that
can have significant deltas from Adobe Analytics. I strongly recommend
you have a native adobe analyti...