Hello guys, I saw a post that talks about the same issue that I had, so I tested many stuff to make it work.
The issue is that the RSS feed blog post’s image or thumbnail not showing on linked in on the Private profile, the company page it has already an option to show image so we are talking about the private profile here.
The steps are:
Create your 1st zap’s trigger like this:
Trigger RSS > Select your social media > Action > Twitter (its working on twitter without any issue, thumbnails appears)
Create a 2nd zap’s trigger:
Trigger twitter > action > linked in > set up action: select Entities urls expanded url
Basically you are telling zapier to share your blog post on twitter then to take post from twitter and share it to linkedin.