Being on year-round has no impact on having kids.All the young guys I talk to are on year round. No concern for having kids or long term effects. I think it’s another side effect of social media, the need to look stage ready year round for whatever reason, less love of the gym and more love of attention imo.
AAS-induced infertility is virtually unheard of. If you can't conceive after using AAS you almost certainly wouldn't have been able to conceive if you neve used AAS.