My 2019 came with a Polaris branded battery that was garbage, and would not hold a charge. I replaced it with a new Yuasa, and have never had any starting problems since. Try that first.
This summer I rode my FTR from Portland Oregon to Los Angeles and back down the Pacific coast solo, camping 4 nights each way. I've put 8,500 miles on the bike since buying it new last summer and it just keeps making me smile!