Type CARD dav password - then incorrect password

On my iPhone 11..This has been going on for quite a while I have no idea what the CARD DAV i.,I feel this is the reason why a lot of the contacts that I update or add from WhatsApp do not get saved so my contacts are from my Gmail account and syncs to cloud But many seem to be missing especially additions I’ve made in the last year . In hindsight , I also feel it could be because of the CARD DAV. and I’m just not able to sort it out I’ve even gone to the two factor authentication at Google but I do not have an app specific password. I’ve also tried some of the other methods of double checking my Gmail password but nothing seems to be working. Wd really appreciate some help because this is getting irritating also affecting something very important which is my contacts, additions to contacts and update contacts which seem to be missing.

Thank you so much