Yeah, Romanescos are an extremely vigorous and rigid squash. I've broken them trying to manage their growth. Depending on how long the vines, they will branch and can produce on those branches. I can't say for certain yours will produce, but if they've branched, then it's possible. It may even toss out a branch at the nearest internode back from the break and continue on like nothing happened.

Thanks, I'll give it some time & see what it does. We're really not ready for the zucchini harvest to be done with for the season.