Restore non-cdb backup into pdb database

I haven’t found any information on is it possible to restore a Oracle non-cdb 19.8 backup into a container-database PDB (still 19c) , or not. The method i have found is not suitable for my situation (convert non-cdb to pdb using DBMS_PDB.DESCRIBE – that seems to imply that the database type is converted + all data is copied during this operation, which is not the same as restoring from a backup). *Export/import/Golden Gate are not viable options for me.

Has anyone had a similar challenge and what was the best way to get a non-cdb to get into pdb form.