Worked in a methodical center, received a warning about liquidation ...?

... of this institution. She went on maternity leave on January 24, 2020, the institution was liquidated on January 31, 2020. Now the child is 2 years old, she went on maternity leave with her second pregnancy. I already gave birth on March 8, 2023, and the prenatal and postpartum reports that I submitted to the Department of Education in January 2023 were not returned. The boss called, she says that maternity leave will not be paid, because the methodical center where I worked has been liquidated. He says that I should write an application for dismissal with the consent of both parties and submit a decree to the pension fund. My employment book is still in the department of education, I am registered with an institution that has been liquidated. What should I do next?