In-Flight Assistant - Bring your Infinite Flight experience to a new level! V-Speeds, GPWS, PA, and more!

As a stop-gap, simply use the MAX 8 Flying Guide which includes V-speeds for various weight and thrust configurations.

I personally never use the V-speeds generated by IF-A. I find the ones on the official Infinite Flight guides as well as the ones Simbrief gives to be more accurate.