I created a video showing that it works on our side: hidden link but I recommend developing the site outside Kinsta because their cache memory is too aggressive, and you will get false positives all the time. Once the site is finished, you can restore it in Kinsta and continue from there.
1.- Could you tell me what you mean by " developing the site option is not an option for us"?
2.- Yes, we have been working on the staging site to avoid running tests on the production site. This is done for security reasons, and it is a good practice.
3.- I have set your next message private so you can share the credentials to the new staging site, where we will continue running any tests necessary.
The problem with Kinsta is that the cache is very aggressive, and sometimes the changes made to the site are not reflected, including the ones to the menus.
Regarding the suggestion I made earlier, because of the aggressive Kinsta cache memory, taking a copy of the production site outside Kinsta, making the changes, and the restore it in Kinsta is not difficult to do and will save you time.