Is it possible to do this in Opencart multistore?

Question

opencart

I just can’t find it, and even google how to make it in Opencart so that different stores in a multistore have their own robots.txt, and sitemap?
And is it possible to make your own variable for the store in the OS so that the city for a particular store is inserted in the product header (let's say there is one product, three stores on one opencart, it is necessary that the title be "buy a cup in Moscow" or "buy a cup in Omsk") ?
UPDATE how to make robots.txt found, sitemap found
only variable remains