Here’s a link to their website https://molly.im/ It also links to their GitHub. If you’d want to backup what you’d do is link molly to your iphone signal instance and then the Android client or molly android client of signal allows you to make local backups on device.
Restoring it back to the iPhone won’t be possible but there’s a backup at least. Or rather maybe with that recent change the article talks about it might be possible in the future but not currently afaik.
I’ve been trying to do that for so long but filters don’t stop posts that don’t include keywords in titles so some stuff still gets through 😮💨
Ex: Title: this sucks Post: content that I want filtered
I could stop browsing Lemmy by all but some stuff still gets through even then