Well, then I’d kindly suggest you don’t spread misinformation about Reality XP either!
The only reason you can’t have any Reality XP add-on in FS2020 has nothing to do with ancient or older simulators technologies which are no longer available in the FS2020 SDK, not at all.
As a matter of fact, some of the advanced SDK features which would have been helping were already discussed in the past with one Asobo lead in a private forum… until MSFT stop all communications with Reality XP dead-cold in March 2020.
I don’t believe I have a solve for your question, but related to it, here are 3 topics about this you might want to check out to see if you agree with:
RXP GTN 750/650 and GNS 530/430 for FS2020 - Page 4 - RXP General Forum - The AVSIM Community