Yes. eSIMAdvice currently lists 10 Ohayu Belgium plans.
The lowest displayed Ohayu Belgium plan is Belgium · 3 GB · 14 days · 5G, at $6.74.
Belgium · 50 GB · 90 days · 5G is the current best-value match by displayed price per GB: $0.99/GB ($49.49 in total).
Yes. Eligible displayed prices already include the active ESIMADVICE coupon where the provider rule applies.