DEI policies is anything that can be done to compensate for systemic (not systematic) discrimination in the workplace, may it be during the hiring process or after, the goal being to have a workforce representative of society and that is treated equitably and inclusively no matter who they are. It can take many shape or form.
You have freedom of speech where the government can give it to you, stop expecting freedom of speech on platforms owned by private interests, that’s not how freedom of speech works.