Google has removed support for the FTP protocol in Chrome as it was only used by only.1-.2% of Chrome users. Google conducted a test where it is turned off for 1% of its user base to see if there are any complaints or issues accessing content on FTP sites during the Coronavirus pandemic. The plan was finally to disable FTP support by default in Chrome 81 but still allow it to be enabled again using the #enable-ftp flag. After disabling FTP support in Google Chrome 81, Google has decided to reenable it again to prevent outages and difficulties in accessing.
Source: https://www.bleepingcomputer.com/news/google/google-reenables-ftp-support-in-chrome-due-to-pandemic/