In which sectors do SERP features dominate in Turkey?

Short answer: Which SERP feature dominates depends less on the sector than on the query class: local service queries surface the map pack, e-commerce queries surface shopping results and product carousels, informational queries surface featured snippets and FAQ boxes, and how-to queries surface video. For your own market this should be verified with your own keyword set, not assumed.

Tendencies by query class

• Local intent (services, clinics, restaurants): map pack and review stars.
• Transactional e-commerce: shopping results, price and stock information.
• Informational queries: featured snippet and the related-questions box.
• Visual topics: video and image packs.

How to verify

Run your target keyword list through SERP analysis tools, tag which feature takes space on each query, plan content formats (FAQ block, video, product schema) around that distribution, and measure the gain against the baseline.