FR 658 then FR 5021 at Dublin
Brussels → Dublin → Pisa
Timetable, Dublin time
10:35FR 658 from Brussels at the gate
06:35FR 5021 to Pisa leaves the gate
20 h apart on the timetable, overnight
FR 5021 leaves 20 h after FR 658 arrives on the timetable: more than half a day, so not a connection we count.