См. Документацию: Пример пользовательской навигации
Для этого есть событие и атрибут.
[tabToNextCell]="tabToNextCell"
[navigateToNextCell]="navigateToNextCell"
Также см. tabToNextCell .
interface TabToNextCellParams {
// true if the shift key is also down
backwards: boolean;
// true if the current cell is editing (you may want to skip cells that are not editable,
// as the grid will enter the next cell in editing mode also if tabbing)
editing: boolean;
// the cell that currently has focus
previousCellDef: GridCellDef;
// the cell the grid would normally pick as the next cell for this navigation
nextCellDef: GridCellDef;
}