Transplant autoflowering Timing?

you should actually never transplant a autoflower since a autoflower goes into bloom after 21 days and should not be stressed you should of potted in his end pot

Transplant now mate and I would recommend back filling them good

Your best bet is to get them transplanted Asap. Transplanting an auto can go unscathed if done gently and properly. When the medium is drier and will stay all together for a seamless transition. Root binding on the other will impact an auto much worse.

I'd say do it now! Give her the most time you can to recover. I personally would on your next grow go from your starting container in my case peat pellets to the pot you want them to finish in. The less stress on an auto the better! Cheers and happy growing!