Hello,
Thanks for reaching out!
You are correct that each instance in a recurring event series will have a separate URL. Are you looking to prevent Google from indexing all but the original event in a recurring series? If so, you would need to do a customization – this post has some example code that you could use as a staring point if you would like to give this a shot.
We are limited in the amount of support that we can provide for customizations, but if you get stuck or have any questions, please let me know – I’ll be happy to point you in the right direction!
Thanks,
Jennifer