Are your objects dynamic because they move or do you change lighting in the “game?”
If your objects move, maybe you can try baking to volumetric lightmaps. They’re going to be costly in memory, and you’ll likely need quite a bit to get something remotely comparable to 2d lightmaps, but at least your scene will have pre-baked GI/occlusion that the dynamic objects can sample.
If you change lighting, maybe you can try the Lighting Scenarios for baked lightmaps for each scenario(windows open/closed, day/night, etc)
Otherwise, if you’re completely unable to bake anything, I think you’re a bit out of luck when it comes to mobile. Even dynamic lighting on PC doesn’t compare to the same baked scenario, even with all distance field options, LPVs, etc. You might be limited to a single dynamic Sky Light for ambient lighting. Or maybe you can try Chosker’s localized IBL. I’ve yet to try it and don’t know if it’s supported for mobile, but might be worth a look.