Trident in mainhand while in first person view is positioned differently

might not be a bug

Are you basing your complaint on a comparison with Java Edition? If so, not all differences from Java are bugs. And trivial differences that have no effect on gameplay or the game experience aren't parity issues either.

Affects 1.16.0.53.

Affects 1.16.0.55.

This isn't a bug, just a parity difference and those aren't bugs. Plus, this is a really trivial thing that most people won't notice.

Affects 1.16.200 betas

Affects 1.16.100

Affects 1.16.200.56 Beta

I Confirm in 1.17.20.21

i have been recently trying to work on a fix for this issue, and i made the trident in mainhand while in first person look very similar to java edition and here is how it looks: