In general, the same rule doesn’t stack due to the Rulebook
FAQ, and it would be specifically worded to tell you it did if it did.
Q: Lots of aura abilities say they grant an ability to nearby
units that are within range of any such models. Are the bonuses cumulative (i.e. if I am within range of two models with identical aura abilities, is the bonus doubled)?
A: Unless stated otherwise, no. The bonus for such an ability applies once if any (i.e. one or more) of these models are within range.
You need to apply all rules, not just read one in a vacuum.