Josepth Badrouk,
We have thoroughly analyzed the source implementation and reviewed the feasibility of adding a new row to the SfDataGrid through a custom button. Unfortunately, due to limitations within our internal architecture, this functionality cannot be supported at this time.
We sincerely regret that we are unable to fulfill this requirement. If you have any alternative scenarios or additional needs, we would be happy to explore possible solutions or workarounds.
Please feel free to reach out with any further questions.