Struggling with loudness for 5.1 surround sound audio on YouTube—Ways to improve loudness or can binaural rendering improve loudness and maintain clarity?

I created 5.1 surround sound music for a mod in a Zelda game. I want to showcase my mod on YouTube but it comes out super quiet on YouTube.

I learned about LUFs and YouTube’s target of -14 LUFS Integrated. The game audio is 5.1 surround sound around -26 to -29 LUFs. After some normalization and light compression in DaVinci Resolve, I can get it down to -21 to -18 LUFs but it's still too quiet.

I don't want heavy compression to kill the dynamics just to make YouTube play them at normal volume. Is there something I can do to make YouTube play surround sound at normal level? I’ve heard about binaural rendering (downmixing 5.1 into stereo) as an alternative.

1. Can Binaural Rendering help me achieve a higher LUFS while preserving dialogue clarity (like a center channel), perceived dynamics, and the immersive surround feel.
2. Are there tricks or workflows to make 5.1 surround sound louder on YouTube without over-compressing?