Short answer for India:

• At the Central (all‑India) level, Jains are a notified “national minority” since January 2014. This gives access to minority welfare schemes and lets Jain trusts run “minority educational institutions.” It does not by itself give a quota in jobs or college admissions. ( indianexpress.com, timesofindia.indiatimes.com, thehindu.com)
• Reservation in India is not given solely on the basis of religion. Jains can get the 10% EWS quota if they meet the income/asset rules and are not already in SC/ST/OBC. This comes from the 103rd Constitutional Amendment (2019) and applies to Central institutions and Central jobs; states adopt it separately. ( en.wikipedia.org)
• OBC (state) quotas: In a few states, certain Jain communities are listed under OBC/backward‑class categories for that state’s admissions and jobs. This varies by state and by sub‑community; you must check your state’s current OBC list. Example: Karnataka’s classification has included Jains in its backward‑class matrix. ( indianexpress.com)
• SC/ST quotas do not apply to Jains. Those categories are defined separately under law and are not religion-based. (See the general reservation framework for details.) ( en.wikipedia.org)

Essence: Being Jain gives minority‑status benefits and eligibility for EWS (if criteria are met). Actual reservation beyond EWS, if any, depends on your specific state’s OBC list.