Append text to media_player attribute entity picture on remote ha


I am looking a way to append text in media_player entity_picture attribute after attribute change on remote HA (problem: using remote home assistant integration picture_entity not show on remote HA).

Is this possible?

For now I made test sensor template and append desire text in sensor state like this:

  - platform: template
        value_template: >- 
              {{ '' }}{{ state_attr('media_player.livingroom_mp', 'entity_picture') }}

Now I don’t know how to add sensor state to media_player attribute entity_picture?

Anyone try this? Is possible to do this in HA?

Or there is other way to solve problem, because when using remote home assistant integration entity_picture attribute not working and picture not shown on media player on my remote HA?