I'm sorry to hear that the food is not being eaten, however, it can take birds time to get used to a new food. I have attached a link to some information about this, that you may find useful.
https://www.ivelvalleybirdfood.co.uk/blog/bird-feeding/how-long-does-it-take-birds-to-eat-new-food/
“The day after I started putting this food out mixed with ordinary grain I counted at least 10 pheasants enjoying the feast - I have never seen so many in the garden.”
