Will preamp manufacturers tell you if the model is phase inverse?

In my vast experience, most manufacturers will say something about it in the manual if it does invert phase.  If it is not mentioned, then usually it does not invert phase.  Of course, there are exceptions.

I remember the older cj preamps stated it in the manual, but in really small fine print.

it means you’re switching speaker wires around when you play records....

Or you could just invert the phono leads at the arm/cartridge and be done. I once owned a preamp that only inverted the phono stage, the line stage was normal.