In this video of an older version of Blender (cued up):
After the Bevel operation the users new faces remain Selected. --This is desirable because it’s difficult to re-select them. However, when I do this operation in 2.93.5 the Selection is lost once you click to confirm. (…)
EDIT: after A LOT of faffing about I figured out that you must start this op in Edge mode to have any chance of retaining the selection.