Cluster feeding?

Tori • 28. Benjamin born 4/17/19. IVF warrior.

Do formula babes cluster feed? We are 50/50 pumped milk and formula and one night he wanted to eat every 45min-1hour but since then he goes a few hours at a time with no issues. He is 11 days old and eats 4oz every 3-4 hours during the day.