Yes. eSIMAdvice currently lists 10 Ohayu Sri Lanka plans.
The lowest displayed Ohayu Sri Lanka plan is Sri Lanka · 3 GB · 14 days · 4G, at $5.39.
Sri Lanka · 50 GB · 90 days · 4G is the current best-value match by displayed price per GB: $0.94/GB ($47.24 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.