Question on logos

I’m new to Plex and noticed that the studio logo, ratings logo and audio codec logo is not showing up when I’m on my PC putting movies and shows in as well as when I browse through titles using my Shield TV in our home theater room. All my files are MKV and I thought the logos would show up since when the metadata is pulled and scanned it shows up when I click the edit button, but no logos appear.

Please advise