I'm one of the maintainers of the cloud images and I can confirm that our goal is to release at least GCP and Azure images in addition to the AWS ones for the 3.14 release cycle. We're also looking for suggestions on other cloud providers for which people would like to see official Alpine images built.
An important philosophy to adopt as a user of Alpine is to take responsibility for the software you want to use on it. If you need a particular window manager or desktop environment, take responsibility for packaging it and making it available. The value of Alpine has little to do with package availability, and it's easy enough to package up anything you need yourself.
Building up to a usable desktop in Alpine is a good way to start gaining some of that knowledge.
I had a laptop for a while that I built up from alpine-extended to a pretty nice side machine, complete with Sway, vim, Rust, Firefox, and a couple others.
Alpine Linux is a system which appeals to those who want to know how their system works (and to be responsible for it as such). If you don't want to know how your system works, and don't want to be responsible for it, then much of Alpine's value proposition is lost compared to other distros.
It's not an option for which OS to flash onto my DigitalOcean VM. Getting it going on Raspberry Pi is largely undocumented.
For desktop, it doesn't (officially) support many window managers or desktops.