Provided you are not just eating refined foods and fruits, and you are eating sufficient calories, you are getting all the amino acids you need on a vegan or vegetarian diet. On a vegan diet, the amino acids that can sometimes show up as a deficiency are carnitine and taurine. These are conditionally essential amino acids, meaning your body should produce them, but not everyone does in sufficient quantities. But, deficiencies in carnitine and taurine are very rare, and is almost never a concern.
Best,
Josh
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