I've started using the SfCellGrid component just recently. I came across a few things which may improve the control a bit more. The first one just like you did importer options you may add exporting excel, pdf or storage files through to content of GridData.
And the second one if it's possible how can we SfCellGrid control size to fit entire parent control. In my case, I have TabView and
SfCellGrid inside it. I need to resize to fit the parent size. With default options, there are spaces found in my case as in the screenshot that I attached. The first to fourth is my goal which I used via my custom control, the last one is using