That has been going on our street since lockdown started - plants and garage clearance stuff out on the pavement for others to take. My old car crooklock (doesn't fit the car I now have) has found a home 200m down the road.
On Saturday my partner organised her third plant stall - most from our garden and a few donations from neighbours - and this time instead of just telling people to take what they want she asked for a small food donation to go to a Food Bank near where we used to live (with the highest deprivation and infection rates in Sheffield). After less than 3 hours everything had gone and we had over £100 in cash donations and a dozen large boxes of food (tins, dried pasta, tea/coffee etc).
I think this sort of thing has been going on all over the country - aided by a rise in real community spirit and mutual aid, social media used properly, and a heavy dose of Thursday communal clapping. I just hope some of this survives the return to 'new normal'.