I realise I often have a different perspective on this than many but, if no-one is using it why not let it grow wild? Bees and butterflies will be thankful.

"Handing it over to the council" is a non-starter. They will either refuse to take over responsibility for the area (if it's not big enough to develop) or will take ownership and then promptly sell it to a developer.

My local authority have left lots of these wild spaces and they are great! We do it in our garden and have loads of differing insects that come to visit. It is amazing! All our neighbours hate it though. 😒