Project completed. In the final video, I had to use both Lumen and Screen Space for reflections and Global Illumination. I had to fine-tune the Lumen and Screen Space values in the sequencer, alternating between modes to achieve a 100% accurate result. For static renders in 4K, I had to employ Path Tracing. This was necessary due to a bug in the current version of Unreal 5.3, where videos with resolutions higher than Full HD in Lumen exhibit artifacts and visual glitches in the Movie Render Queue. No such issues occur with Screen Space and Path Tracing.
Final notes: The entire project has been created from scratch, with not a single material, texture, 3D model, or effect that has not been developed entirely from the ground up.