Stunned auto in flower can I get a good single flower ?

Well I know it’s stunned but as my first grow I wanna complete it and learn what should I take care of to make if till end and what yield should I expect it’s at day 45 can I still make it grow more ?? In 5 gallon Mix soil + perlitE Water ph 6.2 Temp 24-28C Hum 54% Lt 100w 22