It's unusual that a forest in urban zone have no path inside, at least desire. Show some hint here : https://www.mapillary.com/app/?pKey=621710929857974 and on Digitaal Hoogtemodel Vlaanderen II, Skyview factor 0,25 m

Survey needed + change landuse to natural wood (it's not a Managed woodland or tree plantation maintained by human to obtain forest products" here.