can I pair 5% niacinamide and bakuchiol?

why not? it’s potentially for anti ageing, can help with skin barrier function and reducing redness.

This bakuchiol also contains retinal. I would use only By wishtrend in PM routine, applying on clean dry skin. No need to apply gel moisturizer after. You can use Dermorepubliq serum in the morning

Sure, why not. There's nothing conflicting about using niacinamide, bakuchiol or retinAl together. It might be a bit drying though, but that's just my speculation

The products work well together! It sounds like you have a good skin regimen!

Yes, no troubles. These are not 2 actives and there is no issues with pH levels here