routing problems

Hello everyone
they put me on a half-completed project, done in codeIgniter 3.1.10
I'm not clear on the system's routing logic, and I would like some help understanding it
basically I have this link in a menu

PHP Code:

<?php if (in_array('consulting_shd', $this->modules)) { ?>
                                                    <li><a href="consulting_shd"><i class="fal fa-file-spreadsheet"></i>SHD</a></li>
<?php } ?>

already exists, which works perfectly, call the module called consulting_shd in modules

I replicated the module, in another called consulting_shdprice and created the html part in the menu

PHP Code:

<?php if (in_array('consulting_shdprice', $this->modules)) { ?>
                                                    <li><a href="consulting_shdprice"><i class="fal fa-file-spreadsheet"></i>SHD price</a></li>
<?php } ?>

but in $this-modules it doesn't find consulting_shdprice, and if I remove the control and click directly on the link it redirects me to the home page


what am I doing wrong? what can I check?
Thank you in advance, and sorry for my English