Yes. eSIMAdvice currently lists 34 Stellar eSIM Guinea plans.
The lowest displayed Stellar eSIM Guinea plan is Guinea · 500 MB · 1 day · 4G · + Free VPN, at $2.39.
Guinea · 20 GB · 20 days · 4G · + Free VPN is the current best-value match by displayed price per GB: $3.45/GB ($69.00 in total).
Yes. Eligible displayed prices already include the active ESIMTWEAKS coupon where the provider rule applies.