All skins have disappeared

Hello,

Last week, all my skins disappeared for (apparently) no reason.

I tried to delog and relog from my microsoft account multiple times, using my iPhone, my Switch and my Minecraft Java, but the custom skins I had refuses to come back.

What did I miss ?

EDIT: As requested in comments, I edit this bug in order to give more insight regarding my issue. I don't know what I can do in order to be more compliant with the bug reporting guidelines, I've already added screenshot, specified my platform and already detailed my problem, anyway, here is my attempt:

I uses MCPE on switch, ios and windows.
I had few classic skins from official market place, but also some got some skin parts from event such as the everyday gifts from christmas event.
They were supposed to be stored in my microsoft account (I did migrate few monthes ago). The last time i did change my skin (maybe last summer), I did chose a classic red hoodie and then went on the character part in order to equip a bionic left arm (I cant' find anymore).

I did use this for few monthes, both on Switch and IOS.
Then on early february my skins disappeard, and my dress room was totally empty.
On early june, my dress room is still totally empty and I ain't got no skin in my dressing room, only Alex and Steve.

Now, I have my bought skins back from the market place, but my saved characters are still gone and all my looted character parts, too.