Minecraft java skin won't show up

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this ГЛІБ

I can advise you some things, but if the issue persist you may need to reach Mojang support.

But first, please answer the following questions:

Is this happening on Windows 11 or 10?
Is this happening with an specific skin or with all your skins?
Did you tried reinstalling the whole game + launcher?
Or what did you tried so far to fix this problem?

Ok Thank You Very Much I will Try them but thank you once again

Thank You Very Much Man 😊

Buddy, try installing a previous Minecraft Java version to see if you're able to upload the skin from there

Also, you can try checking and performing some of the advises on this similar thread on the Mojang bugs page :
https://bugs.mojang.com/browse/MC-101579

Thank You

Yes when I try to change my skin in Minecraft Java my skin is stuck on the Alex skin but the same skin works for the Bedrock Edition of Minecraft . And I have tried using another skin but that too did not work .