Page 27: That's the oyumaru! Sadly I'm not able to find out what it's called in English or Chinese. Really is a new material to me, sorry. おゆまる works if you want to buy it from Rakuten or amazon jp or look up youtube vids (in Japanese).
It seems to be some kind of heat plastic. In case you can't see it, there's a hot plate included in the tools (the thing that looks like a casserole dish on the previous page is labeled a hotplate). The instructions say to lay a piece of cooking paper over the hot plate, put down a silicon cupcake mold with the oyumaru pieces cut to 1/6, then heat it up to 90 degrees. Then place that into another silicon cupcake mold so you can hold it and knead it, I guess. The white cream is made with clear oyumaru and a "pinch" of white oil pastel.
There's some extra stuff about taking it in and out of the hotplate if you need to make it softer, or cooling it with cold water if you want to harden it. Personally I'd check how soft it is before trying to squish it into the thin plastic mold.
Page 42: Yes, it is just wrappers, haha. The supplies listed on Page 30 is "food bags of various kinds". Just a note that if you have a Daiso near you they do sell cute food wrappers, ribbnos, etc, or you can get them off taobao.
The first candy (left) says to cut up the wrapper to size, then use cellotape to seal left and right.
The second candy (middle) uses a bag sealer after you've inserted the candy to seal the bags, then the edges are cut with pinking shears. There's some shenanigans with how the jump ring is attached after that, if you're interested I'll take another look after I get off work.