Begonia ferox help

I need some help with my Begonia ferox (apologies, I thought text was uploaded to my last post and for some reason it didn’t upload? 😬) I bought a couple of cuttings months ago and as soon as I got them I kept them in a large plastic lunch bag with sphagnum moss and over a couple of months heaps of roots grew. After they had rooted, I planted them in African Violet soil and perlite mix. They grew for a bit and now they’re just stunted. I’ve tried to propagate them through leaves, and had crappy success. After I planted them in the soil, I put them in clear boxes with leca and water down the bottom to have some humidity. I water them with Foliage Focus and some indoor plant food from a random website. Any and all help would be appreciated! I’ve wanted a B.ferox for such a long time and don’t want it to die. In my prop box, all my other Begonias are fine. Just the B.ferox is having issues 🫠🫠