Man pages matching name curlinfo_ftp_entry_path in section 3:

CURLINFO_FTP_ENTRY_PATH.3.en	debian 10 / libcurl4-doc
CURLINFO_FTP_ENTRY_PATH.3.en	debian 11 / libcurl4-doc
CURLINFO_FTP_ENTRY_PATH.3.en	debian 12 / libcurl4-doc