Yes. eSIMAdvice currently lists 10 Ohayu Ireland plans.
The lowest displayed Ohayu Ireland plan is Ireland · 3 GB · 14 days · 5G, at $6.74.
Ireland · 50 GB · 90 days · 5G is the current best-value match by displayed price per GB: $1.05/GB ($52.64 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.