Oh!? Why hello there!

Siffrin does not carve with his knife.

This one, This knife right here ^^^ the blade is made for slashing outward (the curve increases dynamics and contact during a slice) or inward (inner sharpened curves are used in agricultural purposes with further evolution into weapons) it is weaponry, they should not be carving with it!

if you want canon reference as to why he doesn't carve, he literally states they lost their carving tools before the loops!

If you want to carve something out of wood, you need to have tools much thinner and more precise, not to mention Sharp to make something as simple as a spoon <- in this video alone, there's: spoke shave, draw knife, hook knife, and sloyd knife

(you can substitute gouges to that list as an alternative for the hook knife & add files if you don't use spoke shaves for a clean finish, some sandpaper goes alongside woodworking always)

Now I'll acknowledge that the person in the vid I linked is specialized in carving spoons & axe handles and has the tools for that, so if you're doing more Whittling, then "carving knives" are literally named for their use and they look like this:

small blade, big handle, also known more specifically as a chip carving knife, it's the most common used for small projects that don't use a vice (in the vid the vice is a special kind called a shave horse, used for objects that need adjusting while working yada yada dw about it)

but I wanted to make A singular post addressing this inaccuracy I see so often in fics and art when they mention carving, and I hope someone sees this as an invitation to do more research

Maddie!