I honestly think the best solution is to have a smaller icon when the file is synced, and have a larger icon when the file is syncing. You’re assuming the file is synced at all times, so no need for a giant icon to say “yes, it’s synced”.

However when the file is syncing is when there could be an actual issue, so you could make that icon large to say “hey, this file isn’t up to date here, give us a second.