There in lies the difficult bit I think.

Maybe look around at what variety’s are native to you and then maybe have a search online for how they are different. Leaves will be different sizes/shapes possibly. Grab a couple of hops of the plant crush/rub them between your palms firmly to see how strong a scent they give off that will probably help the identification.

If they don’t have much scent maybe just use them in the main brew and finish with a dry hop of another variety. I did something similar with my hops plant a couple years ago, it was more the fact that I could say my hops were in it than that they made a massive difference to the brew (though I didn’t have much, it is a bit colder here).

If they are super strong in scent maybe dry hop with them. Also don’t forget to pick and dry them first.