Here’s the short version of the long story for mapping an FTP drive in Windows 11:
If you really need a drive letter → use Mountain Duck. If just access is enough → use “Add a network location.” map ftp as network drive windows 11
Windows 11 removed the native “Map network drive” option for FTP (unlike Windows 10/7). You can’t just use File Explorer directly without extra steps. Here’s the short version of the long story