As someone who is above average in height, should I kneel to receive in the Ukrainian Byzantine Rite?.
Don't go as far as outright kneeling, but if he's awkwardly reaching up to you, sure bend a knee to reduce your height to a practical level.
Even with him on the Ambon, I'm a full head taller than my priest--and he's injured his right shoulder badly enough that he has to rely on a server to hold the other end of the cloth (name escapes me at the moment) over the gifts. I really have no idea how he makes it through the communion line (but it helps that he has the deacon distributing ss well)