Amazon claims kodi is blocked, can’t load on new firestick 5.7.3

I just purchased a firestick yesterday and had trouble loading Kodi. I was told by Amazon it can’t be loaded because they have blocked it. Is this true? Before I search one more video on loading kodi( I have watched many, doing the install with the video) nothing works. What is the solution beside loading it on my phone(too small) or laptop or pc? Could someone from Kodi answer this before I do any more research as it is making me weary? My firestick is 5.7.3 version. Please PM me with an answer. Would greatly be appreciated or send a link on how I get around it. Mostly I wanted to see if I could do it.