Option to only mark post as read when opened

I am using the voyager app on iOS and I think I’ve decided this one is my favorite to use.

However, there are a couple things I’d like to see added: an option to not mark a post as read on image open, only if I go into the actual post. The second would be smooth animation on phones that support promotion. It feels like when I use this app everything is so laggy. I’m not a developer so I don’t know how it’s handled but none of the other Lemmy apps feel like I’m using a 60hz screen.