Not able to update 15.2.1
Im bot able to update 15.2.1 as updates are available but options are not their of download and install
Question marked as
Try to update via your computer, see this Apple article: Update software on iPhone, iPad or iPod touch in iTunes on PC
https://support.apple.com/en-gb/guide/itunes/itns3235/windows
If you have a Mac, see this Apple article: Update your iPhone, iPad, or iPod touch with the Finder
https://support.apple.com/en-us/HT212185