Item shows up differently compared to s4s

Hi. s4studio_mesh_1 is the only 3d model in the blend file that is being imported. The body parts you're seeing under the rig are not. Your mesh should not be parented under the rig.
The mesh is not adapted as intended.
1). It should have two uv maps: uv_0 (for projecting textures, rename yours) and uv_1 (for morphing, is meant to be transferred from the head);
- double-click on the name and change it to uv_0;
- click on + to create a new map, change the name to uv_1;
- expand the rig, make head_2 selectable ( cursor icon);
- select your ears, add data transfer, choose head_2 as source object, set the rest like in the pic, apply;

2). it is not affected by the head bone, which is why it is flying;
- select b__L_Mid2__ and delete it with - button;
- in edit mode select everything with A, click Assign.

3). it is not vertex painted. Try vertex painting them with 00ff00 and using the headfixer cheat
- type 00ff00 and Paint - Set vertex color;
- after importing the blend in s4s instead of earrings, Shift Ctrl C to open the console, enter headfixer, press Enter