So what you are saying is that MTH needs to take the current release of the app make zero changes, and re-release it on iTunes with a new version number and release date to appease apple.
What do you think will become of Lionel's iCab app that hasn't been updated since 2017?
I have no idea if a "re-release" of the same or a change in font type/size/color would meet the smell test, especially if there might be compatibility issues or red-flagged stale code due to advances in the related operating system environment. As mentioned, maybe someone with real-world app-store experience can chime in with some insight.
Although I have an iPad, I'm primarily an Android or Windows user. The android MTH DCS app is dated Nov 05, 2018 while the Lionel Lionchief app shows an update date of FEB 15, 2022, and the Lionel Universal Remote Controller updater app is dated Mar 02, 2020. I'm not familiar w/ the iCab other than seeing its version 2.0.2 is 5 yrs old as you stated and don't see the Android equivalent by Lionel LLC in the Android playstore. The Apple ios Lionel LCS (ver 3.8.2) is dated 5yrs ago while the Lionel Wireless Camera app is dated 2018.
IMHO, generally speaking why mess with something if an app works as it was designed to work and continues to function properly and maintains the currently accepted system security standards through subsequent operating system updates. Unfortunately the APP/business world seems to be of the belief and practice to make change for the sake of change with often no material improvement. Is it self serving and/or job security self preservation?