Yes. eSIMAdvice currently lists 12 AeroCell Belarus plans.
The lowest displayed AeroCell Belarus plan is Belarus · 500 MB · 1 day · 4G, at $1.19.
Belarus · 10 GB · 1 day · 4G is the current best-value match by displayed price per GB: $1.16/GB ($11.59 in total).
Yes. Eligible displayed prices already include the active AFFINCO coupon where the provider rule applies.