The Murano translation of Chapter 2, Expedients, contains this:

I will expound this sūtra of the Great Vehicle to them,
And assure them of their future Buddhahood, saying:
“You will attain the enlightenment of the Buddha
In your future lives.”

Referencing the 1989 version of The Threefold Lotus Sutra, offers this:

The words of the Buddha that we must be particularly careful to understand correctly here are:

“I predict that such men as these
In the world to come
Will accomplish the Buddha-way.”

We should pay special attention to the phrase “the world to come.” This does not mean “after one’s death” but “sometime in the future, when one will gradually have advanced, step by step.”

The Lotus Sutra teaches us that when one attains enlightenment, one becomes a buddha immediately and this world instantaneously becomes the Land of Eternally Tranquil Light. The sutra also teaches us not that we cannot go to paradise until we die, but that the Buddha dwells in our minds and paradise exists in our daily lives.