So, the Theory of Evolution has failed to relate to Popper's falsifiability criterion.
If a theory has lost the potential to be falsified, it is no longer a scientific theory,
neither scientific fact.
You are being willfully obtuse. The ToE has NOT lost the POTENTIAL to be falsified. However, myriad attempts over a long period of time have failed to falsify it. Scientists can try over and over again, but thousands of attempts to falsify the ToE have failed and all the evidence supports that evolution is a fundamental process of life. REAL scientific attempts to falsify that evolution occurs could be done validly by the scientific method every day of the week. But still, evolution is not falsified.
The specifics of detailed mechanisms and exact line of descent are still the subject of research and some of the theories (e.g.,. punctuated equilibrium) are controversial and have or may be falsified. Not the theory that evolution occurs, just specific mechanisms. It is in this realm that YECs
falsely quote Gould as either questioning or admitting the defeat of evolution.
It is literally belief in Genesis and a very young earth that does not have the potential to be falsified--it is based on belief and
a priori assumptions that are not amenable to any kinds of testing by the scientific method.