Honestly, from this photo it doesn’t really look like a mature Anubias gigantea yet. Gigantea usually has much longer, narrower leaves and a more elongated growth habit even when young. This looks more like a smaller barteri-type anubias or possibly a juvenile plant that hasn’t developed its adult leaf shape yet. A lot of sellers use stock photos of fully grown emersed specimens, so what arrives can look completely different at first. I’d still grow it out for a few months before judging too hard, because anubias can change leaf shape quite a bit once established underwater.