Apex

struct FStaticMeshSection4

        // Apex Legends Mobile (new2)
        int32 unk_index, unk_verts;
        Ar.Seek(Ar.Tell() + 28);
        Ar << unk_index;
        Ar.Seek(Ar.Tell() + unk_index * 2);
        Ar << unk_verts;
        Ar.Seek(Ar.Tell() + unk_verts * 16);

#if DAUNTLESS
        if (Ar.Game == GAME_Dauntless) Ar.Seek(Ar.Tell()+8); // 8 zero-filled bytes here
#endif
        //?? Has editor-only data?
        return Ar;

----------------------------------------------------

struct FStaticMeshLODModel4

        // Crackdown 3 & Apex Legends Mobile
        int32 unk_size, unk;
        Ar << unk_size << unk;

        FStripDataFlags StripFlags(Ar);

        Ar << Lod.Sections;

        ...

        uint32 SerializedBuffersSize, DepthOnlyIBSize, ReversedIBsSize;
        if (!bIsLODCookedOut)
        Ar << SerializedBuffersSize << DepthOnlyIBSize << ReversedIBsSize;

----------------------------------------------------

static void SerializeBuffers

        // Apex Legends Mobile (new2)
        for (int i = 0; i < 2; i++)
        {
            FColorVertexBuffer4 DummyColorVertexBuffer;
            Ar << DummyColorVertexBuffer;
        }

        Ar << Lod.IndexBuffer;

----------------------------------------------------

struct FColorVertexBuffer4

        // Apex Legends Mobile (beta)
        if (S.Stride > 4)
        {
            SkipBulkArrayData(Ar);
            return Ar;
        }

        DBG_MESH("ColorStream: IS:%d NV:%d\n", S.Stride, S.NumVertices);

----------------------------------------------------

postprocessing after Lods.Serialize2<FStaticMeshLODModel4::Serialize>(Ar)

        // Apex Legends Mobile (new2)
        Ar.Seek(Ar.Tell() + 4);

        Ar << Bounds;

        if (Ar.Game >= GAME_UE4(15) && Ar.Game < GAME_UE4(16)) goto no_LODShareStaticLighting;

        // Apex Legends Mobile (new)
        int32 Count;
        Ar << Count;
        Ar.Seek(Ar.Tell() + Count * 12);

        ...

        // Apex Legends Mobile
        Ar.Seek(Ar.Tell() + 4);

        unguard;
    } // end of FStaticMeshRenderData

    ...

    if (bHasOccluderData)
        {
            // Apex Legends Mobile
            int unkSize;
            Ar << unkSize;
            for (int i = 0; i < unkSize; i++)
            {
                Ar.Seek(Ar.Tell() + 16 * 4);
                int elemSize;
                Ar << elemSize;
                Ar.Seek(Ar.Tell() + elemSize * 16);
            }
            Ar << unkSize;
            Ar.Seek(Ar.Tell() + unkSize * 12);
        }

----------------------------------------------------

scaling from ExtendedBounds (doesnt work properly from Bounds)

    // Apex Legends Mobile (new2)
        UStaticMesh4* LoadingMesh = (UStaticMesh4*)UObject::GLoadingObj;
        FVector Scale = LoadingMesh->ExtendedBounds.BoxExtent;
        Scale.Scale(2);
        for (FStaticMeshLODModel4& Lod : Lods)
        {
            if (Lod.PositionVertexBuffer.Stride == 12) // depends on implementation of unpacking
            {
                for (FVector& V : Lod.PositionVertexBuffer.Verts)
                    V.Scale(Scale);
            }
        }