Try putting out the cat box and food to see if the scent can bring back your cat, to those things. It sometimes happens. Put it on your porch and keep and eye open for the return.
I returned to the USA from a trip to Europe 2 days ago (still jetlagged). I had with me my Mini 3 Pro, which I bought new in the USA from Amazon years ago back when things were reasonable (and which I used a good bit in Italy while on the trip)...
That part shouldn't be very expensive for you to get and not too difficult to repair yourself if DJI won't help you.
']Mini 4 Pro Side Housing (Brazil - Mercado Livre)
Amazon has these parts as well but I think in Brazil, Mercado Livre is...