No way to tell until you smoke it. Even then, very difficult without it being a unique one that’s hard to miss. They look happy though! Welcome to ILGM
Unfortunately there is only one method of identification that I have found and it costs about 300$ us after you send a sample to their lab.
If they can’t identify it they will refund your money and when they are able to they will let you know for free.
I had the most amazing sativa buds that I grew with gifted seeds and wish it was more affordable but instead I just enjoyed it and defied to start smoking and growing more sativas until I found what I liked but always make notes of strains because by the human eye there is no way to tell