It's not totally inconceivable that there are Harbor Freight torque wrenches that are initially is on par with a CDI, Precision Instruments (both of whom Snap-On rebrand), or the Tech-Angle with regards to torque accuracy, but good luck ever getting a reputable metrology shop to touch a Harbor Freight torque wrench (or one that isn't American made, for that matter) when it inevitably comes time to do a re-calibration.

Not even like Knipex, Wera, or a similar German tool company?

If it's manufactured in a western country, it's probably fine, I don't think you see too many like that here in the U.S.

It's usually either American, Taiwanese or Chinese, and a reputable shop like Angle Repair, for example, absolutely will not touch a Chinese torque wrench, and might only ever touch a Taiwanese torque wrench if it's a warrantied item on one of their supported brands, and probably only with some arm twisting on the part of the vendor they're doing warranty work for.