Fewer engines are always better if you can meet power demands (reduces design work, production, material costs, weight, maintenance, etc).
China has struggled to match American turbofan technology for years (you could argue they only recently caught up with Pratt’s F119 from 1990 in the last few years).
Anduril hasn’t released much in the way of specs, but it can carry four 19-tube M261 rocket pods loaded with a whopping 76 AGR-20s (anti-drone air-to-air missiles).
By my math, that means the primary payload bay has to be good for at least 2,760 pounds.
That’s a lotta heat.