MSS Homepage - Activities "On behalf" not displayed

Hello Experts,

I'm facing an issue which makes me crazy since almost 2 weeks.

I've customized correctly (I guess) my MSS Homepage to display my team but i don't have the "On behalf" activities which should normally be displayed by default.

I removed my custo to have the initial launchpad in LPD_CUST but i never had those activities.

I tried with the standard SAP MSS role but i still have the problem.

In a previous project, those activities were displayed correctly without any customizing.

Could it come from a BASIS wrong custo? Service in SICF not activated?

Thank you for your help in advance.