There is many food there.
isare many foodfoods there.
Is the above sentence correct ?
Your use of 'there' twice is fine. However, your use of 'many' is wrong, as 'food' is singular. In most contexts, you could use 'much' instead. That would be gramatical here:
There is much food there.
but that doesn't sound great to a native English speaker - instead, simply
There is a lot of food there.
Use 'many' for plural nouns e.g.
There are many pizzas there.