I've built several covers to match cabinets or other trim in a house. I have also seen pictures and paintings hung over the panel.
An electrical panel is never supposed to be in a closet or mounted behind anything that blocks access to it. But the rules get bent and nobody wants to see an electrical panel. Whatever you do, make sure it's easy to remove or open, that there are no problems accessing the interior of the panel.. make sure you have room to remove the cover!
Opinions vary on the legal issue of covering a panel, but in a house, it happens. Accessible is the key word. I build them large enough to expand with a few disconnect boxes, just in case.
If your cabinets are a modern style, you can match them closely at Lowe's or the Depot, they can order a frame and door to your specification. Then all you have to do is mount the frame to the wall.
Got to be several ways to hide it.
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