26-30*C doesn't sound extremely hot to me. I am in much colder climate, our summer temps are in high 20*C, we had number of days already this summer with as hot as 33*C. All my succulents are outside, most get whole day sun (sunrise to sundown). As long as your plants are acclimatized, I do not see a reason they should be outdoors for 3hrs only - that is really not enough sunlight.

I am not familiar with husk (is that rice husk?) but am aware that many ppl in your location use it. How does it drain? Do you have a photo of just husk? If plants are still wet after about a week, it seems to be quite water retaining. How much perlite did you use? - quite a bit is visible; I would use minimum 50% of total volume and mix it well. We always say that potting mix should be dry, but it should not be excessively dry for days. It isn't that easy to get it right, perhaps a "skewer test" will help: insert bamboo skewer or bamboo/wood stick, chopsticks deep into pot (at least 3/4 down). When you take it out and it feels cold-damp and may have some particles sticking to it, mix is still wet enough. If it comes out dry and clean - time to water. After doing it few times, one should get pretty good idea how fast is mix drying up. Or just keep using this simple 'helper'...:) Plants should be watered when needed, not on a schedule.

Make sure every container has drainage hole. They also shouldn't be sitting in a saucer full of excess water (not seeing that in your photo - just pointing out what should be done).

Air circulation should be good. Do not cramp too many plants too close to each other.

Not quite sure why you think your frilly echeveria is sick? Can't see in the photo.

All of them will have better color in better (more hours of) sunlight.

Btw; what kind of soil were they in from the store? It is best to get rid of all of the existing soil - but depends on what it was. Here, most are in peat and that needs to be taken all off.

Direct sun is fine, as long as you give them time to adjust. Don't throw them directly from cool shady house to full blazing sun all day within a day. Give them 30 minutes more outdoor time every week or so. I just leave my succulents outside day and night, though admittedly it is cooler here right now.

Perlite is a drainage aid, so it should be mixed in with the rest of the soil. 50% perlite to 50% soil is a good ratio.

Do you think if I give them more sunlight they will recover? Cause I'm considering to propagate them by leaves but I have no idea if it will work from a stretched out leaves.

They will start perking up if you put them in more light.

I don't think there would be a problem with propagating those leaves.

If the mix is well draining, plants should be watered thoroughly until water runs out of drainage hole. All excess water needs to drain, and plant should not be watered until mix dries up again - as I described in previous post.

Different soil than using needs to be taken off, all of it. It usually doesn't drain that well, and if kept around the roots, nothing much is changed by surrounding it with new mix. What your mom is suggesting is true to some extent when planting perennials in the ground, but growing in pots is very different.

Keeping the perlite on top doesn't do anything; being so light it isn't that good for top-dressing either. It will improve drainage of other media it is mixed with, but only if mixed thoroughly and there is enough of it.

If you have garden/outdoors space, there is nothing better for any plants. I do not know your reasons for growing indoors - but would not keep plants inside unless I lived without any outdoor space. I have to bring them indoors for winter (it gets into twenties C below zero here), and can't wait until temps start getting warmer in Spring to put them outside.