You have to consider a couple things. If you leave your plant in the small planter you will see issues arise that have to be dealt with, and a decreased yield because of pot size. If you transplant, you may have to deal with issues, but the increased yield will be worth it.
I have transplanted from 5 gallon buckets to 20+ gallon planters and have reaped the rewards.
With me it’s the old saying, you don’t know if you don’t try. And if you try, you will get better at it for next time.