Im not sure if this is officially documented or mentioned before in this community place, but I noticed that we are able to change the Google Calendar (as data source) events to be shown on Appsheet by chaning the value in JSON here.
By default, it is set to -90 / + 90, meaning the events with data for 180 day periods will be thrown to App with mean date today().
For instance, if we wish to get the events with date in the last year, change “FrmDasInThePast” key value to -365 like the screenshot as above.