petunia bloom is tubular, won’t open. The edges turn in.
This only happens to some of them, not all. But seems to be spreading each day.
I notice that it is one particular cluster that is doing this. This is completely normal as the flowers fade, so it is possible that these are only open for a very short time, and are completing their cycle early. Picking them off at this point will usually encourage more blooms. I don't think that there is an issue here, but I do know that some cultivars are more sensitive than others to certain environmental conditions.
This article will give you more information on the care of these: https://www.gardeningknowhow.com/ornamental/flowers/petunia/petunia-care.htm