Do It Yourself

I have been working toward a permaculture garden and landscaping with native species. Mostly consisting of small slow changes to increase insect habitats and food sources for local fauna. A local nature conservation program nearby sells permaculture plant sets to encourage the use of non-invasive species. I think the idea is gaining awareness. You might enjoy the documentary biggest little farm.

https://www.biggestlittlefarmmovie.com/

I have lived in two different US cities that planted native fruit trees in the public spaces. Apples, pears, serviceberries, pawpaw fruit, etc. People were encouraged to enjoy. That isn't what you call a food forest, but it's a "do-able" thing that cities could undertake that would help the local pollinators and residents.