I also recently did some “engraving” on dried leaves. Did it on ones I found in the forest so they weren’t exactly flattened, so I just had to make the best of it. I’m also into ceramics, I make plates & vases, etc… So after the biscuit firing (before glazing) I put some masking tape on it and I lasercut a logo/text/pattern into the tape. Then I remove the tape so I can glaze that part with a color, let it dry out, then remove the rest of the tape and spray paint it again with a transparent glaze. Then glaze firing and tadaa.
As a side note, when you’re a new user to the forum you start out with Trust Level 0 and this means you cannot upload images. (you’ll need Trust Level 1)