The support & slicing software used in the workflow of (stereolithography) resin 3D printers offer an option to host the supports on a raft. The raft size changes dynamically to the top-view silhouette of the printed object so often times it may take up the majority of the build platform. A support raft’s intent is to make removal of the final print from the build platform easy.
Your vanity plate, when turned face-side down (making first-contact with the build platform), would present and print very similar to the way a support raft would otherwise print.
Support raft deployed in Chitu Box for the Elegoo Mars:
Support raft deployed in PreForm for the Formlabs Form3:
I’d second Pascal’s suggestion of bossing up the underside for added structure.
If it weren’t for the chamfer-rolled edges and a uniform-flat shield plate was acceptable, it’d take less than 5 minutes to load an SVG shape into the laser cutter and end up with a vanity plate made of oak, cherry hardwood or acrylic.