Ab show requires meeting 2 important criteria

a) having low enough bodyfat%

b) having abs, well everyone has abs but having well developed abs is requirement for good ab show.

Now, for b) FFMI is good proxy as FFMI measures muscularity normalized for height.

You can measure find out your FFMI with this tool

If you've below average lean mass and even if you are at lowbodyfat your abs will not be

While genetics dictate where you lose the fat first from, eventually if you get cut enough you will lose it from all unwanted places. So, it just means you've not progressed far enough in your cut to see the changes just yet

You can't target fat loss in 1 spot. This myth, known as spot reduction, has been consistently debunked by science. To lose fat from a specific area, you have to lower your overall body fat percentage. For example, a systematic review by Ramírez Campillo et al. (2020), titled "Regional fat loss from the affected body part by aerobic exercise only," found that "no significant effect was observed regarding body fat percentage or fat mass reduction by localized aerobic exercise."

Here are some rough benchmarks for when you can expect to see your abs

Men Abs typically appear around 10–15% body fat, with sharp definition below 9%. Your face will start to look leaner around 13–14%.

Women Abs become visible around 16–20%, and the face slims down between 18–22%.

Keep in mind that if you're very muscular, your abs might be visible at a higher body fat percentage. At 85% of your genetic potential you might see some ab definition, but at 90% they'll be much more pronounced. The guys you see with washboard abs are usually at 95% or more. Everyone stores fat differently, so use these as general guidelines. The goal is to find the right combination of body fat and muscle for your own body. Remember, spot reduction is a myth you can't crunch your way to a 6 pack or a leaner face.

Use this tool with your accurate body fat measurement to see where you stand here.

As a reference, average sedentary men are at about 70-85% of their genetic lean mass potential, while average sedentary women are around 78-83%.