My mother is on maternity leave, I want to go to work part-time, but they refuse because...?

According to Art. 55 of the Code of Labor Laws, it is forbidden to engage women with children under 3 years of age to work at night. That is, you cannot work at night.

Regarding parental leave, in accordance with the legislation of Ukraine, it is at the woman's request that she is granted parental leave until she reaches the age of three. If you wish to terminate such a leave, you must notify the employer of this with a corresponding statement no later than 10 calendar days in advance.