That's Amore

It was played during the end credits.

when everyone is waking up towards the beginning of ep.

driving to winery

Lucia leaves Albie's room; Tanya and Portia have breakfast

wine tasting; on a yacht, Tanya and her new friends go to Palermo

while the yacht reaches Palermo, Tanya realizes that Portia and Jack have been having sex

at the Villa, Quentin tells Tanya they should go to the Opera that night

Harper, Ethan, Cameron & Daphne arrive back at The White Lotus

back at The White Lotus, Harper orders more wine for the table