23,000 years is really not a meaningful distance at all in terms of evolutionary timescales.
For example: Women's feet have gotten considerably larger over the past several decades. For example, in the 1960s, the average size was around a 6.5, in the 1970s it was 7.5, and today it's often cited as between 8.5 and 9. That's a whopping 30% (according to Gemini) increase in them whoppers, in my lifetime alone.
I think it's well know also that when there's a certain type of environmental condition that puts different stressors on something evolution can happen only in a few generations. Look it up. There's countless examples of rapid evolution that's well known to happen.
"Evolutionary Scale" time ranges is normally what we associate with the ability to evolve entirely new body morphologies. However, for simple changes in length of existing structures often only several generations is required (a few decades).
Have you tried asking these programs to provide some sources and reading those instead?