The following come from beef, chicken, fish, eggs, and you don’t get from plants: Vitamin B12, EPA and DHA omega-3, Vitamin D3, Creatine, Taurine, Carnosine, retinol.
Plant provide, but less efficiently: iron, zinc, choline, calcium (some tofu provides, but depends on coagulant used), iodine.
On the flip side, plants provide fiber and numerous phytochemicals that meat, fish, and eggs lack.
>Vitamin D3
Irrelevant amounts come from diet, adequate amounts come from sun exposure. Everyone should be supplementing this.
>Taurine, creatine, Carnosine
Irrelevant, synthesized by the human body.
>Retinol
Best consumed from carrots, sweet potatoes, etc. Only relevant animal source is organ meat (liver), which most people aren't consuming.
>B12
Even meat lovers get deficient on this, dietary intakes are usually inadequate. My mother and sister are rabid meat eaters and supplement it, everyone who has the means to should.