About iPhone 7 Plus

Hello my favorite company of watches and iPhones and iPads I bought an iPhone 7 plus from your company from 2 weeks and I didn’t know that ios 16 will not support my iPhone and I don’t want to buy a new iPhone because I will waste a lot of money so is there any thing that I can do to make iOS 16 downloaded in my iPhone in these 2 or 1 years until I buy a new iphone ? And thanks for your support and reading my message p