my understanding is that there are a few MOND champions who are still holding on to the idea while everyone else has moved on.
It has fallen far from its glory days, and is more an old reliable tool than a leading physical theory.
This is different from MOND, which is a distant second contender compared to dark matter.
In the latest Marcel Grossman meeting (2024) there was no string theory parallel session but there was an explicit Loop Quantum Gravity session: https://indico.icranet.org/event/8/program
So string theory is now pretty officially an "also ran", definitely not a leading theory.