This is new development. Places where you can take a break. Normally near farm houses. You may find a bench, a loading facility for electric bikes, all you need to make some coffee and may even fresh apple pie or yoghurt in a freeze... You cannot sleep there. It just started, so now only in Overijssel and Gelderland.
You can recognise them with this logo:
This page is in Dutch, but you can click a region at the map and will be forwared to a map with all resting points in that area.
Alternatively, you can select resting points based on a region ("Kies een categorie") or a town ("Kies een plaats"). I do not think the latter option has any practical use.
On your mobile phone
You can go the site https://www.rustpunt.nu/rustpunten and you will see nearby resting points.