I have the same problem, even with opengraph-image.jpg

this is quite a bit later, but it doesn't help that you don't have a /favicon.ico on the root of either websites... and for me google took a decent about of time to use my favicons...

so, add the favicon file and wait some time and see it on google 🙂

I don’t understand, I’m using nextjs feature which lets me use png as favicons. Shouldn’t nextjs handle everything?

like this redirects to homepage: https://www.portfolio-quiz.com/favicon.ico
and this just 404s: https://www.freelogo.dev/favicon.ico

yeah that works for normal favicons (on the pages), but you need to make sure you create a favicon.ico file as nextjs doesn't auto convert it (so you can use an online converter)

even .png can be converted to .ico directly, just rename it

while that can work, it is not a very smart idea... (clients use file headers to actualy know hot to render, but you shouldn't scam extentions)