Source:
https://www.reddit.com/r/redditsync/comments/14hb7h3/one_week7_more_days/jpcby48
Correction: the pop up for Lemmy should start to appear sometime this weekend
Also apparently confirmed in discord that kbin support will be coming:
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The app will show a pop up to sign up to preload his app “Sync for Lemmy”, not to sign up to an account on a Lemmy instance.
Prepare for another influx of users!!
Any form of visibility will help, so I think this is a great idea!