my 2017 is currently running Ventura...yours should be able to if it is from 2017:
iMac (Retina 5K, 27-inch, 2017)
Model Identifier: iMac18,3
Part Numbers: MNE92xx/A, MNEA2xx/A, MNED2xx/A
Newest compatible operating system: macOS Ventura
Tech Specs: iMac (Retina 5K, 27-inch, 2017)
User Guide: iMac (Retina 5K, 27-inch, 2017)
