Irdial

I have experimented with microblog.pub in the past. It’s easy to set up, and federation worked just fine for me.

“iCal” is often used to refer to Apple’s calendar serrvice. Using DAV5x is the preferred way to sync this to your Android device

Create an app-specific password for your Apple account. You can use that to log into iCloud from DAV5x with the “login with email address” option. This will add the account to your system, making it accessible from any calendar app including Fossify Calendar.