Many instances will absolutely want to do their own branding across the board, and that’s totally fine, but I also believe that many would like to see a unified approach to the platform. The beauty of the decentralization is that site admins are free to run their instance however they like.
No such feature exists yet on the desktop version, but I am sure it’s on the wishlist already. Apps might be able to implement this themselves, but I can’t say whether any have yet.
Edit: clarified
I don’t think it does. Decentralized doesn’t mean every instance must appear unique from one another, though they certainly can if that is their wish. There’s no reason why a group of common instances shouldn’t want to provide a unified approach to branding their platform.
Thanks, the theme is just my usual rediggit for lemmy (the dark variant is coming soon). The point of the post was just to highlight the navbar logo concept.