A 3C certification listing was recently spotted for the Samsung Galaxy Fold 2 5G and indicates that the foldable will come with the same 25W charger as the Samsung Galaxy S20. This means the Galaxy Fold 2 will likely charge from 0 to 50 percent in just half an hour.
https://www.notebookcheck.net/Samsung-Galaxy-Fold-2-5G-will-feature-the-same-25W-EP-TA800-fast-charger-as-the-Galaxy-S20-0-to-50-percent-charging-in-30-minutes.480303.0.html