Private is default, which means only you can wear it, everyone else can still see it.
Viewing post in Sally Shopkeeper - VRChat 3D Avatar comments
There are two seperate scenes "Sally_PC" and "Sally_Quest"
1. Copy your avatar ID when you uploaded to PC
VRCSDK > Content Manager > Copy ID
2. Open scene "Sally_Quest" and select the Sally avatar
3. In the Inspector, paste (Ctrl+V) the ID into the Blueprint ID, click "Attach"
4. In the Builder, at the bottom, swap the Platform to "Android"
VRCSDK > Builder > Build > Platform > Android
5. Upload again!
I know this is complex, there used to be tools not relying on Unity to upload, but VRChat devs took them down in favor of their internal store