What should i do about the bunny in my grannies back yard?

HII so i just arrived at my greatgrandmas house yesterday. im visiting for a month. she told me that she just found bunneh in her yard. i was interested because i have a rabbit at my house where i live. i can't go around asking if it belongs to anyone because my granny lives in the ghetto and i will probably be killed. lol BUTT im pretty sure someone just released it into the neighborhood. i don't want to call animal control because they'll just put it down. i would keep it but i live all the way in korea and i can't bring it back. my great granny is too old to manage and train a pet bunny. is it just best to leave it in the yard? i've been feeding lettuce and carrot and banana. its a really cute bunny (albino) and i think that its about 4-5 months old. also i made it a cardboard house. the bunny is coming up to me and letting me pet it :) soo sweet. SOO today im going out to buy some bunneh food and ill just let it in the yard. do you think this is the best for the bunny to just live in her yard. also my grandma and grandpa live with my greatgranny so they feed it too. thanks so much!