Hi Julia,
I guess that the question you are referring from @sulova.andrea is this one right?
Currently we do no have a direct way to get the metadata only in openEO Platform as far as I know. Please correct me if I am wrong @stefaan.lippens @sean.hoyal @daniel.thiex .
Anyway, the simplest workaround I could propose you to use is to select a really small area in your AOI and the temporal extent covering your range of interest and save the result as a netCDF . In this way you will get the information about the available dates, let me know if you need a sample code for this.
@m.mohr maybe the inspect process could be used to return the metadata of the cube without the actual data? I remember we discussed about this functionality time ago.