Multiple springboot deployments

We have two distinct Camunda spring-boot applications in separate mono repos, currently in deployment they are completely separate, they have their own UI, dB, engine etc.
One of the new asks is having these both accessible from the same UI - is this possible?
My ideal situation is to have the code surrounding each application (delegates, bpmns, custom REST) to remain completely separate and individually deployable, then have a single dB and UI that will support both.
Is there a way to accomplish, is there a better method available, or is the only way to combine this two applications into a single application?