It is very strange that there is no news either way. If she was pregnant and if she gave birth, there would definitely have been pictures posted by Faith. If she lost it, I would assume a post would be made looking for sympathy (which, for once in her life, she would honestly deserve). So in my mind, there is one of two possibilities:
1) There is some sort of therapist involved who has intimate knowledge of Faith, the family, how she met a groomer on Discord, travelled across country, got Gunted, pregnant, coerced into sex with horse and pig, and strangled. They have rightfully identified the Internet is bad for Faith and demanded she not be allowed online unsupervised, not be allowed to post specific pictures, and have the only Internet accessible device be a communal one (i.e. no phones, laptops, etc). This could be voluntary or mandated due to her allegations against Ralph and the court cases. Lack of Internet could be why she has taken up crafts?
2) She did give birth, but it was planned that she would give it up as soon as it popped out. This would have been an arrangement made when she first went home and Mr Vickers showed her the true nature of the Gunt. Since it would be someone else's child now, I could see there being a legal requirement to only keep pictures of the child as personal mementos.
If any of this involved a legal agreement, a clue could be found in when Ralph stopped talking about his kid. Maybe none of this is correct, but it is strange behavior from a new-mother, especially since she is normally so desperate for attention and kudos. Also unusual for the Vickers, who take great pride in their family and are known to overshare. I can't see them changing so drastically without an outside force making them, and it could be this same force is stopping Ralph from saying what happened.
EDIT: Also, don't forget female members of Faith's family all have the thyroid disease (was it Hashimoto's?) that can make pregnancy difficult and less likely to go to term without issue, I believe the Vickers lost a child before Faith due to this and she was found to have the same illness.