There is no lifespan option within tyFlow simply because determining the lifespan of a particle is often a problem with an unknown solution (outside of the most basic setups where particles are birthed and then clearly deleted by a Delete operator in the same event).
However, it may still be worth adding a lifespan option for those basic setups at some point, although it's not currently on the todo list.
However, it may still be worth adding a lifespan option for those basic setups at some point, although it's not currently on the todo list.