Depending on where you are located, you can find a replacement screen on Amazon, eBay and AliExpress, whichever works for you. These are just examples; there are more available on these sites and more.
[link|https://www.amazon.com/Samsung-Replacement-Display-Digitizer-Tempered/dp/B07GR4SLHS?th=1|Amazon.com: Srjtek for Samsung Galaxy J7 Prime Screen Replacement LCD Display Touch Digitizer Glass Sensor G610 G6100 G610F SM- G610M/DS SM-610F/DS On7 2016 Parts : Cell Phones & Accessories|new_window=true]
[link|https://www.ebay.com/itm/313813802250|For Samsung J7 Prime 2016 SM-G610M G610F LCD Touch Screen Aeembly Replacement|new_window=true]
[link|https://www.aliexpress.us/item/3256802758102577.html|For Samsung Galaxy J7 Prime/G610/G610F LCD Screen Display Digitizer Assembly Replacement Strictly Strict Tesed No Dead Pixels|new_window=true]
I don't know if you are planning on doing the repair yourself or not and I'm sorry to say iFixit doesn't have a guide for your phone, but I did run across one that looks decent over at fixez.com.
[link|https://www.fixez.com/guides/samsung/samsung-galaxy-j7-prime-repair-guides/samsung-galaxy-j7-prime-display-assembly-repair|Samsung Galaxy J7 Prime Display Assembly Repair|new_window=true]
Good luck with your repair; let us know how it goes!