Earlier quoted context omitted.
+1 for Bitwarden. It is literally the best solution out there. Been getting to increase uptake in personal circles with (very) limited success. The wife keeps trying to convince me that the ship has sailed in trying to protect info online. She's probably right.
Now that I'm not only using a Macbook and iPhone, I've been looking for cross-platform solutions. For a week I've been using KeePassXC + Syncthing between four devices. Syncthing is also syncing my Obsidian vaults which has replaced Apple-only Notes.app. Bitwarden is definitely more polished, and Syncthing is definitely (much) more fiddly than using Bitwarden's and Obsidian's ($5/mo) native syncing tools. But I like…
In the almost 10 years I've been running this setup, I think I hit a conflict one single time. I don't quite remember the details, but I think I accidentally edited something in the mobile app, and before saving, edited something else in the desktop app or vice-versa. So it was pretty much my fault.
Other than that, literally never had an issue. Password managers are by their nature mostly reads, and very occasional writes, so it's very hard to put yourself in a situation where conflicts happen, even if you don't pay attention to it. I've made an identical setup for my (fairly savvy but non-technical) fiancee, and she's never hit an issue either. I had to insist a bit for her to get on board, but years later she actually loves using KeePass. She's thanked me multiple times for how convenient it is not having to remember passwords anymore!