So, open your project folder right now. Check the manifest.json . Download that icon. Is it exactly 192x192? Is it a transparent PNG? Does it have a 404 error?
: Some modern browsers use this size as a high-resolution fallback for standard website tabs. Technical Implementation icon-192x192.png
"src": "/images/icon-512x512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" So, open your project folder right now