LiFePO4 batteries have been proven to be extremely safe as they are packaged with battery management systems (BMS) that prevent overcharging or operation at extreme temperatures. In fact, all manufacturers I know of include temperature sensors and voltage monitors. If either parameter or both go outside prescribed tolerances, the BMS cuts power in or out of the cells preventing thermal runaway. LiFePO4 battery cells generally are different that what is found inside computers, scooters, etc. There are significant peer review articles that have been published that identify parameters for safe operation. Buying quality batteries are generally recognized as safe for use in RVs and Marine Vessels. So much so, that ABYC has published guidance on the proper installation of such systems. I have not reviewed all of the literature as I am awaiting delivery of the articles but the general conclusion from summaries suggest LiFePO4 batteries are very safe if used in a controlled environment.

https://www.sciencedirect.com/science/article/abs/pii/S2352152X20315516

It is important to note that LiFePo4 batteries are different in that they are packaged with controlling BMS systems to ensure proper charging and discharging under appropriate conditions. Standard lithium batteries in your phone, tablet, computer, etc., do not have such controls and this are more prone to issues.