Is it possible to implement the functionality of PUSH notifications using browsers in an offline Intranet network?

Question

local server

Good afternoon, please tell me if it is possible to implement PUSH technologies inside the offline Intranet.
I am just starting to understand this topic, and as I understand one of the prerequisites is an https connection, then googling found something that they say on the Intranet this cannot be done, so I decided to ask here right away.
Can an intranet site send notifications to users' browsers