Collection URL Meta Tag

Hi, can anyone help?
I share pages from my website on LinkedIn using the link to the page, in this case a job part of a collection CMS.

When I paste the link in it shows the template meta tag, instead of the one I’ve set in the collection page.

I can access the collection url page which seems to be the one showing the templates meta tag as it doesn’t exist! I’m going around the houses on this one.

I don’t want to creat a field in the CMS for meta. As it’s a general tag for the section ‘careers’. Can anyone help?

Thanks
Ash