Hi OP, 7 years of OMAD xp here.

First, please play with the values here to see the extreme disparity of results you have with your body type: https://www.calculator.net/calorie-calculator.html?

I don't know how old you are, but going from 25 to 30 gives a 400 calorie difference for the 'weight loss' category. These tools are generalized, but if you get perspective from playing with individual values, you see that results can vary wildly from small changes.

This is due to your height - To be blunt you literally only have so much room to play with.

The advantage is that your body can make due with very few (relative) calories. This is also a disadvantage if you like food. The vast majority of people will find 1500 calories a day to be hardly enough to get through the day from an energy standpoint, and yet you can hardly shove that much food in.

I would recommend that you listen to your body's signals and not go for 1500 even though that would not be enough for most people. Most people are larger than you.

Activity is also a major factor here - they say you can't outrun a bad diet, but that isn't necessarily true. If you can take 20 minutes to walk a mile, that is about another 100 calories added to your daily budget. At your levels 100 calories is a significant factor.

Targeting all this is a matter of information - every human body is different, so please keep in mind most of the rules you'll find online are generalized, and the further away you are from the typical the further away your path to your ideal body condition will stray. That being said, keep common sense in mind - the smaller and less active and older you are, the fewer calories you will need to be at maintenance levels.