@Jack-van-Tilburg
wow - all thumbs up!
choose the middle tab <Manage> - Click "Add" and place your POI, name it.
I hadn't discovered that yet - a good way to define your own POIs. Thanks for the tip!
The option to save the result as POIs and upload works well, but is indeed complicated.
In the meantime, I like the way via a "dummy route" as a copy template a bit. One advantage is that POIs contained in a route (tab <manage>) are always visible on the map, regardless of the zoom level. This is different for POIs from an existing collection (<Search>, <Library>).