I am certain that plant was not ready at 8 weeks. ( breeders lie ).
Your grow experience , environment for plants , etc.….. all play into length and result of grow.
That plant “ barely “ is showing fade in the lowest fans. You could have went another 2 weeks or so.
Triches are checked at calyx areas , not leaf. So if you saw triches looking mature “ on leaf “ , it is because those mature differently
than actual flower. Even the bud sizes show lack of size and weight.
NEVER go by breeder estimates ( harvest time ) plants will mature and harden off on it’s OWN … not by a calendar.
They are finished AS LONG AS IT TAKES. No matter what week you are on.
But too late to worry about it now.