goto_definition does not work for labels within user-defined commands (Neovim)

[miEsMar]

I have defined a simple command to automate the format of some equation references:
\newcommand{\Equ}[1]{Equation \eqref{#1}}

In Neovim, when trying to gd inside such command, it fails to find it, while doing it in Latex built-in commands work fines (a direct \eqref{} command for example).
I was previously using VScode, and there it works even with such user defined command.
Do you have any idea of why this behaviour ?

Thanks a lot

PS. It also shows an error (Undefined reference) at each of such commands. Is it normal?