Okay, that means that your Homey is not linked to the account you are signing in with. You might want to check that.
For now, try the alternative route: instead of selecting your Homey, select the option ‘My Homey isn’t listed’ and fill in the support request form.
You can also make full local backups (including the installed version of Homey OS and apps), thought the process it is less user-friendly. You have to connect your Homey to a computer. Check this knowledge article for more info: Connect Homey Pro to a PC or Mac with USB.
Keep in mind that the cloud backups only include your settings, devices and flows. You cannot use it to restore to a prior Homey OS version.
I usually wait several days and check for user reports on this forum and on Homey’s Slack channel. Depending on the changes I sometimes make a local back-up, so that I can restore the prior Homey OS firmware if needed. Then I update, if there are no reported issues that might affect my setup. As far as I am able to determine of course.
Not that I am aware of. Note that regarding flows, you can manually export (and import) them as an extra backup.
