Give them time for getting over the shock of being cut off from the mama plant. Don't over water them now, I think your mix may be holding too much water unless you live in a desert where it dries out fast, less water is more for most San. but not all.
They like low ligh generally if the have green tips, the ones with hard dry ties like even less water and more indirect sun. A few are jungle growers, some need a lot of water, so you need to know what your species are.

The new babies, should always have two inches of rhizome, so just be careful of watering, put in the shade until they adjust and watch for new growth, they love the heat,
but not direct sun. Go to Endangeredspecies there is a download of a free book which is fun, easy to read and has all the important facts, this was the first book printed in the US on Sansevieria, privately done by my friend. If you have additional questions just email me. Norma

hello, I think the pups are collecting power. The were supported by the mother plant and grown by her power. Probably you will have to wait a lot more. If you are curious, take a look at the roots! I ensure you something is happening down under.

Well you don't have to do it now, unless you turn them out to see what's going on underneath (I don't suggest this). BUT, if you do, I'd change the mix. The mix you're using (as Norma suggests) is not right for these plants, likely to hold too much water, tho' theoretically counteracted by the use of a terra cotta pot.

In making new mix I'd use just mix (C&S mix or houseplant mix), no sphagnum, no vermiculite which can each hold tooo much water. These plants want very fast drainage best accomplished by just mix & perlite or pumice, whichever you can get.