Samsung Research India is primarily WAO and allows flexible WFH (3/2 WAO/WFH split).
Though this depends a lot on your project requirements and your manager.

Software Engineer

Need to go once/twice a week, depending on team

Product Manager

I would like to know which all companies in the financial services sector are offering this.

Hardly any. Companies in financial sector want you to be in office.

Management Consultant

Please comment companies with flexible work.
Not necessarily WFH or WFO.

Companies offering flexible work