I wanted to narrow down the choices but did not know how microservices were done in Perl.

Spring Boot was used as an example and to convey a gist. (Other people ask similar questions with the same motive eg. this user's reddit post) (I like the à la carte versus kitchen sink analogy and believe the former is more anologous to Perl's approach).

I am seeking uniformity and alignment with the technology direction my company is focused on and for political reasons I prefer not to use a web framework for developing microservices. The sooner I can wrap an API around the Perl parts of the system the sooner I can move on.

As long as the Perl implementation is not awkward I will not have a problem with it.