Activision is notoriously lazy when it comes to going after cheaters, so even if they do start targeting DMA, I’d expect them to take the easiest route first and implement a library ban on free firmware. As long as you’re using something like ~$40 basic firmware from Rie or another generic firmware seller, you’d be fine. And if you’re using premium firmware, you have virtually nothing to worry about.
That said, with Ricochet, the sheer number of guides available for building your own firmware, combined with how capable AI has become, there’s really no reason to spend money on basic firmware from anyone. If you’re only looking for basic firmware, just build your own.