Full HD Object Enhancement

I have a high-quality background saved as a JPEG/PNG, but the single object sitting in that scene is noticeably softer than everything around it. I need the object recreated, up-scaled, or otherwise improved so the finished composite holds crisp detail at a true Full HD resolution (1920 × 1080 or higher) while matching the scene’s lighting, colour and perspective.

I’ll send you the original background file with the object clearly marked. Please return:
• A flattened JPEG or PNG ready for immediate use.
• An editable layered file (PSD, TIFF, or similar) with the upgraded object on its own layer so I can adjust later if needed.

Key points for acceptance: the object must look native to the scene, show no pixelation or AI artefacts, and leave the rest of the background untouched. A quick, tidy turnaround is appreciated.