TPM 2.0

Anyone have any idea how to turn this on for Windows 10? I have a new AMD 7040 series and installed Win10 like an idiot and now cant upgrade to Win11 as TPM2.0 is off and I cant seem to turn it on. I also don't want to do a fresh install as I already paid for a Win10 key and don't want a buy a new Win11 license, unless there's a way to do a totally fresh install and keep the Win10 key. Thanks