I don’t have any problems with enabling an alarm and adjusting the time in homey but I understand that is a no-go for you.
Have you checked the Timey app?
Timey
Use text variables in time flow cards with a 24-hour format: ‘H:mm’, ‘H.decimal’ or ‘H’
00:00 is the earliest, 23:59 is the latest.
Current version
Stable: 1.4.0
Test:
Why a own app for time flow cards?
I wanted to set the time in one place and have it reflect in all my flows. The built in time flow cards does not support to set the time through variables, and the alarms did not have all the flow cards I needed. So I made a app which behaves like the built in time flow cards, just with…