You “shouldn’t” jump a lead acid from a lifepo4, but in a pinch you absolutely “can”. I wouldn’t hesitate if I was stranded out on the water. In the parking lot I’d look around for another option first.
Just realize you can ruin your Lifepo4 batteries BMS the first time you do this. Lifepo4 cells are capable of producing more amperage than the BMS may be able to handle. So, if you connect the battery and too many amps can transfer you burn out the LifePo4 BMS instantly. See this owners manual
Do not charge your batteries in parallel either. If one is low and one is charged the bridge may transfer too much amperage. These are not a drop in replacement for Lead Acid Batteries.
That said, when understood, they are much much better. Like has been brought out the run times are amazing!! I can run my trolling motor 8-10 on the river for 5-6 hours and be at 60% with the 125ah batteries.