Yes. eSIMAdvice currently lists 10 Ohayu Estonia plans.
The lowest displayed Ohayu Estonia plan is Estonia · 3 GB · 14 days · 5G, at $6.74.
Estonia · 20 GB · 90 days · 5G is the current best-value match by displayed price per GB: $1.17/GB ($23.39 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.