Hi!
The Work from Home concept came into existence vigorously, post COVID-19, in view of the need of the hour. However, some of the organizations are still continuing with it as they find it more favourable, suitable and advantageous. To allow work from home is a prerogative in the hands of 'employer' and not 'employees', unless the term specifically expressed and defined in the offer of appointment itself. If the employee has been engaged on full-time basis (i.e. working from office), he has no right or claim to seek work from home. It's entirely at the discretion of the company concerned to take a call, keeping in view the nature of work, need and requirement.
JSM