I've been working on something to handle the "plumbing for your observability". It's a way to collect, stream, and route observability data that can get it from and into a wide variety of systems.
It's not targeted at the 'cloud native' crowd, but rather more at traditional on-prem infra.
It is all manageable via an API and provides a Kafka API for streaming data (RedPanda under the hood).
Name: Morio Documentation: https://morio.it/ Code: https://github.com/certeu/morio
Note: here is no commercial angle here. This is an open source project of (the CERT of) the EU (license: EUPL).