hospitalization leave

Hi mummies, I’m currently 37 weeks pregnant, and have gotten the green light from my doctor. She has granted me HL since I was 36 weeks pregnant, however, my employer has been asking me to go back to work despite showing my HL letter. May I ask if I am obligated to work in office despite having HL? Is it wrong to ask an employee to work despite having HL and assume it’s wfh. #firsttimemom