The Backstory:
I have infrequent AFIB, maybe once every two or three months for a couple/few hours. It first started back in 2017 after major back surgery. Prior to the surgery I had become worn down from the pain then got my surgery. Not long after the surgery I got a bad chest infection that was going around, then AFIB hit out nowhere. Quite a shocker since I'd been an athlete my whole life.
My cardio guy, I call him my "Electrician" did an ablation procedure and that "fixed" it, sort of. It was the right thing to do FOR ME. I have on-demand meds to take if I go into AFIB, but, to answer your question.....ask your doctor.
Once I stabilized after the ablation MY doctor told me that yes, I can ride, and hard too. He just told me to be careful and mindful of my heartbeat and if it starts coming on, take the meds. So, for the past 8 years I've been living with infrequent AFIB and it hasn't slowed me down at all.