True, entrepreneurship is an opportunity based concept & so is export entrepreneurship. While entrepreneurship in general is based on identifying opportunities & setting up or undertaking a venture to exploit that opportunity, export entrepreneurship is based on the ability to identify, create & take advantage of opportunities existing in international / global markets. The importance of export entrepreneurship has risen sharply in recent years with the opening up of economies by most of the countries. The benefits include growth in forex reserves, better balance of trade, growth of domestic industry, reduced risk due to diversification of markets & customers, international exposure, increased employment, income, etc..

Actually the difference between "Export Entrepreneurship" and "General Entrepreneurship" is related to the difference between "GNP" and "GDP". General Entrepreneurship causes to increase the Gross Domestic Production while the Export Entrepreneurship causes to increase the Gross National Production.

Export entrepreneurship sounds as though it's related to the "born global" concept, which overlaps with the international entrepreneurship literature.  A born-global company is a business that is international in scope from when it was founded.  If you're interested in these areas, here are some seminal articles (Knight & Cavusgil are very influential in the "born global" literature; Oviatt and McDougall are similarly influential in international entrepreneurship):

Cavusgil, S. T., & Knight, G. (2015). The born global firm: An entrepreneurial and capabilities perspective on early and rapid internationalization. Journal of International Business Studies, 46(1), 3-16.

https://www.researchgate.net/publication/270704294_The_born_global_firm_An_entrepreneurial_and_capabilities_perspective_on_early_and_rapid_internationalization

Knight, G. A., & Cavusgil, S. T. (2004). Innovation, organizational capabilities, and the born-global firm. Journal of International Business Studies, 35(2), 124-141:

https://www.researchgate.net/publication/5223083_Innovation_Organizational_Capabilities_and_the_Born-Global_Firm

McDougall, P. P., & Oviatt, B. M. (2000). International entrepreneurship: the intersection of two research paths. Academy of Management Journal, 43(5), 902-906.

https://www.researchgate.net/publication/260387060_International_Entrepreneurship_The_Intersection_of_Two_Research_Paths

Oviatt, B. M., & McDougall, P. P. (1994). Toward a theory of international new ventures. Journal of International Business Studies, 25(1), 45-64.

https://www.researchgate.net/publication/5223127_Toward_a_Theory_of_International_New_ventures

Article The born global firm: An entrepreneurial and capabilities pe...

Article Innovation, Organizational Capabilities, and the Born-Global Firm

Article International Entrepreneurship: The Intersection of Two Research Paths

Article Toward a Theory of International New ventures

I would call International Entrepreneurship instead of Export Entrepreneurship, as per my understanding it is the area of study which is at the intersection of disciplines. International Entrepreneurship emerged from the parent disciplines of international business and entrepreneurship. 

In the name of God

You can study my papers.

1.      Asheghi-Oskooee, H. (2015, August). Development of Individual’s Entrepreneurship Abilities With Special Educations in Short-Term. In ECIE2015-10th European Conference on Innovation and Entrepreneurship: ECIE 2015 (p. 36). Academic Conferences and publishing limited.

2.      Asheghi-Oskooee, H., & Mazloomi, N. (2016, September). A Strategic Entrepreneurship Model Based on Corporate Governance in the Iranian Manufacturing Enterprises1. In Proceedings of The 11th European Conference on Innovation and Entrepreneurship 15-16 September 2016 (p. 67).

Good luck

Compared to general entrepreneurship, in export entrepreneurship, there can be many constraints and external forces which are beyond the control of the entrepreneur. Especially, influence of macroeconomic factors and the economic stability may be critical