tl;dr: " best plant-based sources of zinc include tofu, lentils, beans, nuts, garlic, raw tomatoes, cauliflower, and seeds such as roasted hemp seeds and pumpkin seeds. "

If you wish to look into the Food Databases, to find the composition of various foods, here are some good resources:

https://www.nal.usda.gov/human-nutrition-and-food-safety/food-composition

Also referenced in the article: Zinc lozenges and the common cold: a meta-analysis comparing zinc acetate and zinc gluconate, and the role of zinc dosage https://pmc.ncbi.nlm.nih.gov/articles/PMC5418896/