Q: can not unlock mac by apple watch . I dont see any “Allow your Apple Watch to unlock your Mac.” from systems preferences

I can not unlock mac by apple watch . I dont see any “Allow your Apple Watch to unlock your Mac.” from systems preferences.

I can not delete " pls consider clearing your mac from junk", although i reset safari. ( but i do not know i reset correct or not ? )
pressed key shift down ? I dont understand your mean ( request reset safari on mac)

Tks/Ken