Man pages matching name forest::tree::writer::simpleascii in section 3pm:

Forest::Tree::Writer::SimpleASCII.3pm.en	debian 10 / libforest-perl
Forest::Tree::Writer::SimpleASCII.3pm.en	debian 11 / libforest-perl
Forest::Tree::Writer::SimpleASCII.3pm.en	debian 12 / libforest-perl