There is no park yet here ; it's a project. 
See Fases here : https://leeuwdenktmee.be/nl-BE/projects/ruysbroeckveld

Actualy it's still a farmland (maybe abandoned but not a park) : 

https://www.mapillary.com/app/?pKey=864728762026979
https://www.mapillary.com/app/?pKey=181081475026098

Some trees have benn planted Saturday 02/12/2023 but not until the Groot-Bijgaardenstraat (circa 50 % on the west of actual forest mapped). Btw it's not landuse=forest but natural=wood (it's not planted to be exploited as forestry). 

https://www.mapillary.com/app/?pKey=263792343348212