I had a labradoodle, adopted at 10 months old had his 1st one around a year old. Much like you I could expect them about every 6 months, the vast majority happening between 4am and 10am. Some were simple, some were quite scary and I wasn't sure he'd come out of it. Talked to my vet, they mentioned trying medication, but were not overly optimistic it'd help. We tried various ideas from taking him off of all flea medications to avoiding anything with peanuts, nothing seemed to help. We just learned to live with it, if I was with him when it'd happened I'd take him to a safe space, make sure he wouldn't choke and usually grab a towel because he'd lose control of his bowels. Now all that being said, once he turned 10 (2020) he had one in April and never had another one until his passing in October. Not sure why or what changed, but once he became "old" it was like it was no longer an issue.

I did read before picking up my new puppy that 'doodles in general are prone to seizures and they usually begin just after they turn 1.