You can achieve most of that via third party apps, which is where the beauty of android comes. Instead of being forced to use Google if you want the best integration or be treated as a second class citizen if you try to use a third party service, most android features can have app defaults to set, so you can use bitwarden or proton if those work better for you (and imo that makes it more versatile, not less). In terms of integrating and syncing notifications with your desktop either KDE Connect, Microsoft’s companion app or Google’s companion app should work, though it’s not going to be automatic or as in depth as Apple’s. I’m not gonna touch the smooth and easy argument as that’s something you get used to over time really with these. I find iOS super clunky to use, you find android super clunky, it’s about which one you got used to first.