Incidentally, early depictions of Buddha did not show him in any human form.
It was not until the Macedonians (Alexander the Great) reached the Indus river in the fourth century B.C. and brought their Classic Greek culture to India, which included anthropomorphic depictions of the gods in art and sculptures.
I have it here somewhere. Do I have it, do I have it? Where is it… yes!
“Prior [to the Macedonian invasion]… Buddha had been portrayed mainly indirectly, through symbols such as footprints or empty thrones. Nowm sculptors began to work more elaborately in stone, with greater attention to the human form. The result was a major change in artistic-religious expression, affecting not only India but also China and other Asian regions where Buddhism later penetrated.”
It continues the paragraph mentioning a Greco-Indian school of sculpture incorporating Greek costumes and hairstyles while representing Hindu religious motifs.
There’s more in there, which mentions Ethiopia and the Kingdom of Axum (Aksum), the spread of Hinduism and Buddhism into China, the first translations of Buddhist texts in China and the significance of that especially on gender roles, but I’ll try to skip to the chase.
“Initially, Chinese Buddhas were stiff, austere abstractions of the deity, but gradually Chinese commitment to human qualities altered the style toward plumper, more lifelike figures, more aligned with Chinese concepts of human beauty.”
Cite: “Culture and Politics in the Classical Period” Experiencing World History by Paul Vauthier Adams (Editor), Erick Langer, Lily Hwa, Peter N. Stearns, Merry E. Wiesner-Hanks.
*They weren’t Greek, they were Macedonian. But they brought Greek culture to Northwestern India and allowed Indian philosophical ideals to be brought to the Western world. “How much Indian influences mattered in what came to be a dynamic religious environment in the Middle East is impossible to say, but they did encourage new ideas about a spiritual life after death, when souls might live happily until the full union of souls, and even the concept of divine saviors who might help elevate mortals through their love.”