Forerunner 255 estimated FTP shown (but its not supposed to have this feature?

Hi. This is a follow up from

FR255 is missing features related to cycling FTP - Forerunner 255 Series - Running/Multisport - Garmin Forums

I understand that Forerunner 255 does not have FTP test. Even if I reach a record of the 20min average power, the FTP value has to be manually entered in my user profile (95% of this value).

I have a few comments on this. Because it makes it confusing nevertheless:

1: There is a version of the manual that tells that FTP test is present

https://www8.garmin.com/manuals-apac/webhelp/forerunner255series/EN-SG/GUID-570C4326-B2C1-4788-B92C-18A96598BF4C-1621.html

Can this version be taken down if it's outdated?

2: My Forerunner calculated an FTP a few days after installing my bike power meter. It estimated an FTP of 191 watts (or 2.8W per Kg). It's an estimate because I have never reached this value. It also estimated a cross country skiing FTP, something that I have never done in my life.

So this means FTP is calculated based on other variables, but not auto detected?