Unfortunately, there's a lot of "promises" made on this site by flat earthers when asked to produce viable evidence for their claims and/or beliefs, but seldom—if ever—are those promises substantiated with hard evidence.
Most questions asked by round earthers are responded to with what amounts to "non-answers" intended to deflect the thrust of the original question. As commented on in another forum here, this often amounts to nothing more than shifting the response into a philosophical discussion about the question itself—rather than supplying a simple answer. It's a clever distraction, but one which the flat earthers never tire of, or seem embarrassed by in resorting to this sort of obfuscation.
Even a question that demands a simple 'yes' or 'no' answer usually results in a tsunami of non-relevant ifs, buts, and maybes.
I wish you luck with your questions, but I'd be guessing you'll have a long grey beard before they're answered with any sort of adequacy.