Questions after seeing it

So someone else pointed out to me about Kay, the birthed alien had breastfed on her and then sucked her to death it looks like heh. Seems like it infected her already-living fetus to make a hybrid. They speed up the gestation and pop out, I think usually not vaginally 😄 Maybe it injected some of the other dna of some of the previous crew it killed 🤷‍♂️ It could keep the female crew members alive, as they showed in the hallway, injecting and birthing repeatedly. However the crew sustained themselves food wise, they could repurpose as well. And/or they could trigger their own slowed metabolism when food is scarce, as was mentioned and shown with the rats. Considering they were in tubes to begin with, the facehuggers were probably created by the synthetic as it was experimenting on the biology.

I want to know why the floating acid blood, when the heroine went on the auto aim killing spree, didn't eventually burn holes in the ship especially after gravity was restored... Seems like there was quite a concentration

1. Rook (the android character resembling Ash from the first movie) successfully synthetized the black goo like compound, and he could use that to "3D print" facehuggers and he put them to storage for later use or something... It was not clear in the movie, that if he thought he already found the key to immortality and invulnerability in the black goo, why would he need the huggers, maybe to synthetize further goo from them later? Anyways it was not clear why, only that he created them from the "DNA" of the Nostromo alien.

2. Rain, when parting with Kay said "here, take this" - that was the "vaccine" sample Rook created from the black goo to provide immortality, etc. In fact it was mixing the alien "DNA" with the host DNA and created hybrids - but Rook didn't know that, he did not have enough time to experiment before ripped in half by the alien. However, Kay's impression and Rain's wording confused her - she had horrible injuries, so she figured she would take it to heal up, but it backfired, as it merged alien "DNA" with her fetus, created a hybrid, then accelerated its growth... and we all saw the rest. But it was because she injected herself with the black goo which tragically was known to Rain that it is not safe, but Kay didn't get the message...

3. This has been a question on the original alien boards as well - the rate of growth shown in this movie is even more unbelievable than the first movie, but the point is - we don't know, since the creature is alien for us.

And with point #3, you touched on an important point: the fast growth was conjured up by the first movie as a way to have a threat relatively soon into the movie, and it was a huge stretch, but believable if you wanted to. But the way they invent characters who are studying the aliens, it is getting more and more absurd that for example Rook is able to synthetize a "vaccine" from the black goo, before mapping out all physiological functions of the aliens...