Unless you need firmware 1.0.2 or above, you should leave FW at 1.0.1 to retain the desirable NFC feature.

Contact Siemens (rather than fellow forum end-user members like yourself who can only guess).  Use the Support Request -> Create new request feature above these online forums. 

A quick online search returned this:

AI Overview

While specific CVEs directly targeting the NFC communication feature of the Siemens S7-1200 +G2 CPUs have not been publicly disclosed, the CPUs are affected by several vulnerabilities in their network and system security. NFC connectivity is an added feature for easier diagnostics and configuration, and its security depends on the overall security of the CPU firmware. 

AutoGen_2671510

Why Siemens decided to disable the NFC feature with the latest firmware update?

https://www.industry-mobile-support.siemens-info.com/en/article/detail/109983196

I have purchased the S7-1200 G2 only for that feature!