Visa types granted by Bulgaria are;

• Bulgaria eVisa
• Bulgaria Short-term (C Type) Visa
• Bulgaria Tourist Visa (T)
• Bulgaria Business Visa (B)
• Bulgaria Sports Visa
• Bulgaria Study (Long-term) Visa
• Bulgaria Work (Long-term) Visa
• Bulgaria Cultural Exchange Visa
• Bulgaria Private Visit Visa
• Bulgaria Transit Visas
• Bulgaria Long-term (D Type) Visa
• Bulgaria Family Reunion Visa
• Bulgaria Medical Visa (MED) & Medical Attendant (MED X)
• Bulgaria Conference Visas (C)
• Bulgaria Journalist Visa (J)
• Bulgaria Missionary Visa (M)
• Bulgaria Mountaineering Visas (MX)
• Bulgaria Film Visas (F)
• Bulgaria Entry Visa (X)
• Bulgaria Employment (E)
• Bulgaria Student Visa (S)

In case you need some references, here are a few articles that could be beneficial.

• Bulgaria Visa Types
• Bulgaria Visa Requirements
• Bulgarian Passport Photo and Visa Photo Requirements
• Processing Time & Fee for the Bulgaria Visa
• Understanding the Bulgaria Visa Policy: Eligibility, Requirements for Travelers