We have introduced two new Mobile settings on the desktop to allow further granular control:
(1) Hide Chat = This will disable the mobile chat for all employees
(2) Hide Company Directory = This will hide the Company tab for mobile users
To locate these settings select 'Settings' on the left-hand side > 'Mobile'.

For more information on the Company Directory:
https://help.peoplehr.com/en/articles/3720021-mobile-using-the-company-directory
For more information on the Mobile Chat feature:
Introduction: https://help.peoplehr.com/en/articles/3435780-introduction-chat-on-the-mobile-app
What the feature has to offer: https://help.peoplehr.com/en/articles/3702120-mobile-chat-feature
Thanks,
Product Team