Chatter component on Lightning Page Layout on Opportunity doesn't contain the Chatter actions: Post/File/etc. As a result, our users are not able to post on Opportunities (or any other record). However, they can post in Global Chatter.
I can confirm that:
a) The "Enable Actions in the Publisher" checkbox is ticked
b) The "Global Publisher Layout" has the necessary buttons indeed
What is missing to enable them to collaborate on individual records (e.g. Opportunities)?
Many thanks in advance,