Experts who know the current scientific literature explain how laboratory and clinical studies contradict the idea homeopathy is only a placebo effect.

Arnica montana and Bellis perennis for seroma reduction following mastectomy and immediate breast reconstruction: randomized, double-blind, placebo- controlled trial

Lotan, A.M., Gronovich, Y., Lysy, I. et al.
Eur J Plast Surg 43, 285–294 (2020).
Abstract

Effect of Homeopathic Medicines on Intestinal Coccidia and Immune Response Cells in Spotted Rose Snapper (Lutjanus guttatus)

Rosero-García ADP, Mazón-Suástegui JM, Dumas S, et al.
Homeopathy 2019; 108(03): 201-213
Abstract