Resources/ideas for creating and maintaining large third party plugin with many DLL's?

Wondering what would be the best way to go about hooking up our backend, a large project that produces both static and dynamic libraries, to our frontend Unreal GUI project. From my research, Unreal seem to like dealing with DLL’s very much, and it looks like working through it is a bit of a desert. The good news is that we do not anticipate many more updates to this library/plugin, and they will be infrequent as they do come, so perhaps that leaves us a bit of room as far as maintenance goes, because from where we’re standing currently there doesn’t seem to be a way to seamlessly integrate (let alone automate with CI/CD) it as a plugin (albeit I did not anticipate it to be a cake walk).

Unreal seems to not like dealing with DLL’s very much*