Calendar data input starting directly out of respective apps

In the booking.com app, when a booking has been confirmed, one has the possibility to transfer the calendar data of this booking to an installed calendar app.
The same is the case with a ticket booked in the DB navigator app. The calendar data of the ticket confirmation could be transferred to a calendar via this process.

The button in German is: Zum Kalender hinzufügen

When one touches this button, a sub window opens with the calendar apps available for further processing.
But in the case of the booking.com app and the mentioned DB navigator app, only the Android calendar app and the aCalendar+ app appear as choice, but not your One Calendar app. Therefore I could only continue with the android or aCalendar+ app.

I found out that it works via the Telegram app, when I start the process directly with an .ics-file. In this case, all three installed calendar apps appear and I can choose the One Calendar app, the Add-window opens, and I can edit and enter the respective data.