I would be super stoked if the creator of RiF created something for Lemmy. But to Sync's credit, I've been able to mess around a little with the settings and make my feed look like RiF in dark mode.
I won't hold my breath for RiF making a comeback (LiF??). However if it does, I'm all in. It was a really sad day when I had to say goodbye to it.
I haven't messed with the settings yet, but the defaults are pretty much how I left sync before I uninstalled the Reddit client, but it used to be able to look basically however you wanted it, and if it can't yet give it time. He's a good dev.