FWIW, I used my hot air gun to remove the LSM9DS1. Upon inspection I saw that one of the chip's contacts did not have any solder on it. So, I reapplied solder to the contacts on the board, and used the hot air gun to reflow the chip onto the board again. However, this time before I removed the hot air from the chip, I gently pushed down on the top of the chip with some tweezers, then removed the hot air while holding pressure down on the chip. That did the trick because I can successfully connect to the collect readings from the LSM9DS1 chip now.
I will say the chip is not well calibrated, but like the accelerators on smart phones, it's more about getting the acceleration vector direction than precise acceleration magnitude. I could calibrate on the ground and compensate in the flight software 🤔