In any case, since you promote Bellarmine, do you limit BoD to formal catechumens as he did?
Right. And for St Thomas, St Robert, Brownson, etc, when they used the term "catechumens" they meant those who:
a. Had rejected their former religion and openly/explicitly asked to become a Catholic
b. Were taking Catechumen lessons from a priest, to learn the Faith
c. Were on the "baptism list" to receive the sacrament at the next opportunity.
For them, a catechumen was a very strict, specific type of person. Everything they wrote about BOD would not apply to 99% of the cases that people come up with today (i.e. a dying "good" Muslim, Hindu, Jew, Protestant, etc). None of these people are catechumens and none of these people could receive BOD. At best, they could ask God forgiveness for their sins, and gain some part of Limbo.