These recipes seem to be fully pointless:
.Trim Birch-bark.
.Tall roll of Birch-bark.
.Opened roll of Birch-bark.
Trim Birch-bark allows dismantling any birch bark object espically the rolls as per notes:
// 3.60 cut birch-bark off existing items for cordage
// meant to help digest tree roll of birch
Tall roll and openend roll are related to the Canadian style birch-bark canoe. Here in Canada we have a heritage of birch bark canoes. They are not made from tiny strips but from huge as much as you can get off in one piece sheets. These rolls might have issues for crafting smaller things so the trim recipe is there for that.
A "cost" to these rolls in the game is that it totally deletes a tree trunk. If we had multiple outputs I might do the tree roll and a "log" as an output.
Saami has advised Finland doesn't have the Canadian style of birch trees so they can't make the large sheets.
If you are deleting the rolls of birch bark you might as well remove the canoe steps under transport.
The Canoe making is one I left in as Brygun_Add (my own) had it which I developed as a Canadian I wished to have it. It is still a time period correct option though not quite so geographically.
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Other items in messages to come.