If you want the row and column headers always visible when you scroll through your worksheet, you can lock the top row and/or first column. Tap View > Freeze Panes, and then tap the option you need.
Freeze multiple rows or columns
Select the row below the last row you want to freeze.
On your iPad, tap View > Freeze Panes > Freeze Panes.
On your iPhone, tap the Edit button , and then tap View > Freeze Panes.
To freeze multiple columns (starting with column A), select the column to the right of the last column you want to freeze, and then tap View > Freeze Panes > Freeze Panes.
To unfreeze panes, tap View > Freeze Panes, and then clear all the selected options.