Since the end of 2021 Louis Vuitton stopped putting date codes in most of their products. They still use date codes on small goods like belts, pouches and wallets.
If your item has a date code this is some good info to check if your date code is matching with your heat stamp or not.
Date code does not guarantee the item is authentic. Legit date codes can be repeated on any counterfeit item. You have to check on other factors as well, like heat stamp, stitching, hardware, lining and etc.