Procedure, functional and Entity Component Systems (Sketchpad, 1963) programs came first.
Micro-services then came along (Distributed computing).
Then OOP was then invented to replicate the benefits of micro-services in single user environments.
Micro-services then came along (Distributed computing).
Then OOP was then invented to replicate the benefits of micro-services in single user environments.
The first systems that could reasonably be described as distributed computing weren’t developed until the 1970s. The object-oriented language Simula was developed a decade earlier.
And those early 1970s distributed computing systems were not, by any stretch of the imagination, microservices. It wasn’t until around the 1990s that the precursors to what we call microservices today appeared, in systems like CORBA, DCOM, and RMI. And the actual term “microservice” didn’t appear until after 2010.
(You may be conflating “service” with “microservice”. Not all distributed networked services qualify as microservices.)