Set availability when creating an event

[lightheaded]

I'm trying to add an all-day event, but I don't want to be marked busy for the whole day:

gcalcli quick --calendar=Home --reminder=16h 'Garbage collection 22.11.2021' and the resulting event is as follows:

Note the availability that is set to "Busy".

Is it already possible to create an event that would show up as "Free"? If not, is it straightforward enough to add?