Hi @Rasmusdahl,
So basically you would like Microsoft Flow to create an Event with the information from Excel, right?
There is no corresponding Excel trigger to work, so if we would like to take use of the information from Excel, we need to use the Get Rows for Excel. (There is also another action called Get Row, which would need the special Row ID, as the Row ID is auto-generated by the Flow service, so here this action should not be the first choice).
After the Get Rows Action from Excel, we need to add a condition to filter the special Text fields, if not, Microsoft Flow would generate Events as many as the row number in Excel.
After that, under the if Yes part, add the create Event action, see screenshots:

For the trigger, is there any other services that we may take use of, for example, Email?
If we could use Email as the trigger, then the flow here should be much easier.
Please reply back if you need any further assistance.
Regards