Xiaomi's Mi MIX 4 is quite resilient, as it lasted a little over a week in a torture test that had it fold and unfold itself over 400,000 times. It is quite an impressive feat, considering that Samsung's original Galaxy Fold lasted a little over 100,000 cycles before sustaining damage.
https://www.notebookcheck.net/Mi-MIX-4-lasts-180-hours-in-a-continuous-fold-test-for-over-400-000-cycles.535133.0.html