The proxy and easing-in advice above is the survival half of your question and it's right, so I'll take the other half, whether a farm moves Reels distribution. Mostly it doesn't. Reach is decided by watch-through in the test audiences the platform picks, and a farm changes none of that. What it scales is how many independent posts you make and how many separate starting audiences you pull from.
So settle which problem you have before buying hardware. If the creative already holds people and you just need more entry points, a farm is a real answer, and the job is keeping the devices from reading as one operator. If retention is weak, twenty devices run a losing test twenty times. And posting the identical file everywhere is one attempt repeated, so change the first two seconds per device, not just the caption.
Best,
Floqal