I believe adalo uses the unix timestamp, as does Xano. I imagine (I have not tested this by the way) if you are creating a new record then the formatting of the date/time picker should be none (i.e, whatever Adalo’s default is). I am not referrring to how the picker looks on screen, I am referring to when you create a new record.
I am going off what I read here in the Xano docs https://xano.gitbook.io/xano/data-manipulation/timestamp
This part seems to be where to look…
If you still have no luck I would try and convert the date picker time to milliseconds and input it as milliseconds into Xano. You can see how to convert a date to milliseconds here Getting Hours/Minutes/Seconds separately