I appreciate you use a different program, but this kind of highlight recovery is right 'up the alley' of our very own Pentax Digital Camera Utility software. It has an excellent 'Highlight Adjustment' tab which works on a very narrow band of clipped highlights - plus you have the added feature of sliders that control specifically whether you recover 'brightness' data or 'saturation' data in these extreme clipped areas.
In this case with the flowers you would be going for 'saturation' to restore the lost colours in the petals, and it can be very effective. This highlight tab will not interfere with the brightness levels of any other areas of the histogram apart from the very extreme right hand edge, so you won't have to make a lot of compensatory adjustments elsewhere.
I know that the Pentax Software has been difficult for many people to get started with, and that's why I wrote my Mini Guide, which I have heard has been helpful for people both here and on the UK forum. It gives details of this highlight correction feature so it may be useful for your issue here. Here is a link to the article :
https://www.pentaxforums.com/forums/post-processing-articles/206286-pentax-di...ini-guide.html