IIRC, in industry, there is at least one big system with 50-ish microservices that includes electronic invoices. (See https://www.conf-micro.services/2019/papers/Microservices_20...)

At our place, we have a few websites written in Jolie and a system of services for evaluating software projects (for exams).

Feel free to drop in our chat if you're interested in chatting more about this with others as well: https://discord.gg/yQRTMNX