Mine's also the same. One side is metal frame and the other side is the foam-like material to cushion and tighten the glass in place. I think it is ok.
Dun think they will replace the whole board since it is the norm to cut a bigger hole to ensure that the pipe can surely fit. Try ask them to cover it up if not DIY with some hard white plastic sheet cut-to-fit and sealed with a waterproof white silicon also can.
Anyway it's good to see your renovations progressing very nicely!
You're very welcome!!!
Hahaha, Rondy ah, I thought u know I'm male all along!
I'm named Tuababy cos I am definitely too BIG to be a Baby!
Actually there is a simple story behind it lah...