SSO to S4 FLP in FES FLP

Dear experts,

We have our FES and S4H systems running on 1909, embedded deployment

In our FES FLP, we have configured a tile for S4H Launchpad. While clicking on that tile it is prompting us for S4H login credentials

We already have trusted RFCs in place and have implemented the steps said in SNOTE - 2485474 ie, importing the Fiori certificate in S4H system. Still the S4H Launchpad tile is asking for its credentials in FES Launchpad

How can I avoid this please ?

Best regards,
Mahesh Babu