Annotations not visible on clicking custom button in 3D Line graph

Annotations are not showing when clicking custom button. I checked it , still didn’t find the problem. Please help me out.
xxx is some 2D array of length tmm

        for i in range(0,tmm,2):
            
            fig2.add_trace(go.Scatter3d(x=xxx[i:i+2,2],y=xxx[i:i+2,0],z=xxx[i:i+2,1], mode='lines',      
                line=dict(
                        color="black",                
                        width=10),))

            ax= xxx[i,2].item() 
            bx= xxx[i+1,2].item() 
            ay= xxx[i,0].item() 
            by= xxx[i+1,0].item() 
            az= xxx[i,1].item() 
            bz= xxx[i+1,1].item() 

            x_annotate=((ax+bx)/2)+0.1
            y_annotate=((ay+by)/2)+0.1
            z_annotate=((az+bz)/2)+0.1
            
            #(x_annotate, y_annotate, z_annotate)
            a1= dict(
            showarrow=False,
            x=x_annotate,
            y=y_annotate,
            z=z_annotate,
            text=f"Member {mem_index[kk]}",
            font=dict(
                color="black",
                size=8
            ),)

            anno_member.append(a1)
            kk= kk+1

      button1= [True for i in range ( len(f3))]

      Model.update_layout(
            updatemenus=[
                dict(
                    type = "buttons",
                    direction = "left",
                    buttons=list([
                        dict(
                            args=[{'visible': button1},
                                  {"title": "RC Model",
                                    "annotations": []}],
                            label="RC Model",
                            method="update",
                        ),
                        dict(
                            args=[{'visible': button1},
                                  {"title": "Members ID's",
                                    "annotations": anno}],
                            label="Member Ids",
                            method="update"
                        ),
                   
                    pad={"r": 10, "t": 10},
                    showactive=True,
                    x=0.11,
                    xanchor="left",
                    y=1.1,
                    yanchor="middle"
                ),
            ]
        )

        Model.update_layout(height=800, width=800)
        Model.show()