Passport Stamp in a Schengen Airport / Entry to Croatia with a Schengen Visa
Upvote:1
You are not required to have entered a Schengen country before you enter Croatia. As you already mention in the question, a multiple-entry Schengen visa is sufficient. Source: Croatian Ministry of Foreign Affairs
Receiving a stamp or not may depend on you having to clear immigration there if you need to claim and recheck bags, but it doesn't matter for your subsequent entry to Croatia.