Questions about vertical jump

Hello everyone, after months of training, I can finally touch the rim. However, during practice, I broke my ankle and won’t be able to train again until February 7. It’s a bit awkward because just when I was able to touch the rim, I broke my ankle so I have two questions:

1-Will I lose a significant amount of vertical jump due to not being able to train?

2-When I can finally return to training, what are the best ways to improve my vertical jump? There are times when I can’t quite touch the rim, and I’d like to improve my consistency.