Not quite.
I, d have a good read of that one too Guerney. The test piece was a 5x5 cm of module cut from a full piece with no edge protection.
View attachment 49125
The conclusion was
If modules are well fitted with correct side sealing "there will be no leaching"
It also points out leaching will occur if modules are cracked and or broken or milled up and thrown on land fill. That figures.
So, have them carefully fitted, with edges fully protected /sealed and don't break them. Dispose of them correctly after end of usefull life. (ie don't grind and chuck on landfill) Remove damaged panels quickly.
If you start with a premise you can normally find some justification. They don't leach if sealed correctly.
Both your links suggest so.