Viva connections icon change in Teams mobile app shows blank square

Hello,

Last week we setup our SPO intranet site as a home site set as the default experience in Viva Connections in MS Teams. Whilst this works well in the desktop app, when using the Teams mobile app a custom icon we've deployed, doesn't show and instead just shows this blank square as highlighted below:

Is this happening because the teams mobile app doesn't support custom icons? or have we missed something in the Viva Connections configuration to get the custom icon deployed correctly to the teams mobile app?

Thanks!