Here is a link to a video which shows how to replace the digitizer (touchscreen) on your tablet.
It is separate from the LCD screen.
The part is available on Ebay. Here is a link to just to show what digitizer and LCD screen parts are available and what their cost is. Scroll down the page to view all offers. You may wish to search online for other suppliers that may suit you better. Just search for Galaxy Tab A 9.7 digitizer to get results
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