This chapter could probably be titled as a Prologue. Only in the sense that all other chapters in the book are from Harry’s perspective, and if I was writing it, I might do it that way.
I do like that there are 2 POVs though. JKR did very well giving us the impression of how the Dursley’s view the world: normal and abnormal. And we only see small glimpses of the abnormal. That is better, because then there is plenty of room to grow through the rest of the book. Even though the magical does get introduced fairly quickly.