A child unattended of parental care, who is subject to the provisions of the special act, after 9 months from the date of entry to Poland, but no later than August 24, 2023, may apply for a temporary residence permit on the same terms as an adult. The only difference will be that the legal guardian will have to sign the application on behalf of the child. If a child who came from Ukraine does not have parents or other legal guardians in Poland, you should apply for the appointment of a temporary guardian who will submit an application for a temporary residence permit on behalf of the child. The temporary guardian represents the child before courts and authorities, takes care of the child and his property (Article 25 of the Act of March 12, 2022 on assistance to Ukrainian citizens in connection with an armed conflict in the territory of that country). More about the temporary guardian here: https://ukraina.interwencjaprawna.pl/how-to-become-a-temporary-guardian-of-a-child-from-ukraine-without-parents
However, if a given unaccompanied child is not covered by the provisions of the special act, and child wants to submit an application for temporary residence in Poland, a guardian will be appointed for this purpose to represent him in the proceedings. The application for a temporary residence permit for such a child is submitted by the probation officer appointed by the guardianship court.
The basis for applying for a temporary stay of such a child may be, for example, starting education in Poland.
*The child must meet the following conditions jointly: be a citizen of Ukraine, come to Poland from the territory of Ukraine due to the hostilities conducted there, legally enter Poland from February 24, 2022, have a registered border crossing, declare the intention to stay in Poland.