Technically speaking, Tea is made from the camellia sinensis plant. If the herbal 'tea' does not have camellia sinensis as in the two leaf and a bud, then it cannot be termed as Tea. Normally herbal tea is made from other plants such as rooibos, yerba mate or spices, dehydrated fruits or flowers.
# Please refer to the blog https://anandinihimalayatea.com/blogs/tea-whisperer/95992513-tea-infusion-tisane-know-the-difference