not sure about the first pic but the second one is where the leaf edge has pressed against something and sort of folded over at an angle probably when its been under strong sunlight and the leaf has gone a bit limp.
one of my seedlings has the exact same dmg on a leaf tip from when i put it under the sun and the leaf wilted a bit and flopped on the edge of its pot leaving a little dmg line where the rim of the pot had been touching the wilted leaf
one of my seedlings has the exact same dmg on a leaf tip from when i put it under the sun and the leaf wilted a bit and flopped on the edge of its pot leaving a little dmg line where the rim of the pot had been touching the wilted leaf