What you have is a limb scar
Sometimes called a cat’s eye
They often look like burls. But there are just where a limb broke off the bark and wood grow over the opening. Most large trees will have several.
Avoid them for traditional bowls for obvious reasons.
You could be an interesting platter or some sort of winged bowl that uses the natural opening as the bowls opening.
I use the limb scar bump for openings % will have a hollow inside.
This often held water and ther will be water stain. All good for the most part.
Once in a while the rot is too extensive to be useful but most of the time the holes are relatively small. Also the limb remains whole or knot will usually slant downward toward the roots inside the blank.
Some examples of hollow forms a maple and a chaphor both about 13” diameter
Below is a maple HF opening set on a limb scar. See the hollow appear below the rim.
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Two views of a camphor HF opening set at a limb scar.
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