If you look at many other cultures, e.g. African mothers carrying their babies on the back. They don't have need for diapers. What many people in the west where we have been so trained on diapers don't know is that babies can be potty trained very early (<3 month). There are quite a few resources on this (search for infant potty training).

That's what we did. Our baby was doing the well known spraying right after removing the diaper the first few days. So we decided to put him on the potty on his second week following advices of parents who did that too: timing, sound cues... In his second month, he already understood the patterns. Since then, he will sometimes pee in the diaper as we are not doing the zero diaper method and he understood it's not that uncomfortable to pee in the diaper. He will poop in the diaper once a week when we are too distracted or when he is having digestive issues with a newly introduced food. No smelly trash, never waking up with a diaper full of poop, no red skin, happier baby. Highly recommended if you have the right environment to implement this method.

With the hope of receiving a reply with proof....

There is absolutely no way a 3 month old is potty trained. As in, the 3 month old infant can communicate and use a toilet. They likely can't even hold their head up at that age.

https://www.babycenter.com/baby/diapering/infant-potty-train... indicates that a potty can be introduced from 4- to 6-months old. Potty trained by 18 months is much more reasonable.

Have you had success with this? I was aware of this when I became a parent but it was impossible to find the space or energy amongst everything else.

Also, where in Africa?

I read several books on this topic but had no luck until about six months in. I also never tried the bottomless for a day or week approach so