No but it’s literally the moogle situation just without the moogle. Each of the three guys leave at one point and it’s clear that’s what the episodes cover. Episode Ignis only reaches far into the end game in the very last scene so theoretically it can still be enjoyed normally with only slight spoilers - but we also live in a different world now than we did in the 1990s, and people just talk online and it’s a fact of life.

The only two exceptions to that are Comrades (which could still theoretically be played before chapter 14 but since it’s a hefty multiplayer add on, why would you) and Episode Ardyn which is clearly a prequel and thus, logically, should be played after the main game. Point is, if you know what the DLC is just by the title, you’ll know where it’s supposed to go.