Kunal, glad you like the plugin!
Not sure I fully understand your situation though.
the API does not update a read sheet event / value upon re calculation
Which API, what event? Recalculation done where?
If you are pulling the data from Sheetsu, then doing some manipulation with the data in Bubble, then to update the data back in the sheet you need to do the logic of first updating the sheet back, then pulling back the updated data from the sheet.
Do I understand correctly what you are trying to do?
That does not necessarily involve the reload of the page, if done right via the logic of WF of the type Action.