Yes. eSIMAdvice currently lists 10 Ohayu Czechia plans.
The lowest displayed Ohayu Czechia plan is Czechia · 3 GB · 14 days · 5G, at $4.04.
Czechia · 50 GB · 90 days · 5G is the current best-value match by displayed price per GB: $0.89/GB ($44.54 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.