Yes. eSIMAdvice currently lists 10 Ohayu Thailand plans.
The lowest displayed Ohayu Thailand plan is Thailand · 3 GB · 14 days · 5G, at $4.49.
Thailand · 50 GB · 90 days · 5G is the current best-value match by displayed price per GB: $0.67/GB ($33.29 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.