Help please over missing iCloud Drive icon on iMac

Hi, I'd welcome some help over something. I've got a newish iMac (and I'm new to Macs). I could have sworn that i had an iCloud Drive icon in Launchpad / the Dock (and possibly an iCloud sign-in web page as well, although I'm not so sure about this). Anyhow, I seem to have done something to wipe out the iCloud Drive icon in Launchpad (and the iCloud sign-in page as well, assuming I had it in the first place). I can still get at the iCloud drive ok via Finder although I did find the iCloud icon useful. (And I can of course get at the ICloud sign-in page via Safari). But is trhere any way I can get these icons back?

Max