На мой взгляд, их два:

◾️миграционное законодательство страны;
◾️востребованность вашей профессии на местном рынке.

Проверить можно например тут:

🌍 OECD Skills for Jobs
https://www.oecdskillsforjobsdatabase.org

🇪🇺 Cedefop Skills Index
https://www.cedefop.europa.eu/en/tools/european-skills-index/labour-skills-shortage-index

🇦🇺 Australia Occupation Shortage List
https://www.jobsandskills.gov.au/data/occupation-shortage/occupation-shortage-list

🇬🇧 UK Occupations in Demand
https://explore-education-statistics.service.gov.uk/find-statistics/occupations-in-demand/2025

🇩🇪 Make it in Germany
https://www.make-it-in-germany.com

🇺🇸 US Bureau of Labor Statistics
https://www.bls.gov/ooh