I think this is correct in concept. Triggering a Lutron light from a physical switch will show as physical. Triggering the same light from Home Assistant will also show as physical as Hubitat sees but did not trigger that action. But if one uses a Hubitat-connected Lutron Pico to trigger the light the light event will show as either digital or blank (as the Hubitat driver for Lutron lights does not always fill the field for digital events).
Were you looking at the button device or the light that the button is controlling? For Lutron Picos the press shows as physical for the Pico device, but will show as digital for the lighting load device that it is controlling (as the on/off commands go through a Hubitat button controller app).
But as stated by others, it's up to the driver to correctly populated the field. One of the changes to Hubitat v 2.2.0 was to add a Leviton DZ6HD Dimmer driver. It previously used the Generic driver. About the only thing I see different is that the Generic driver reported all events as digital and now the new driver correctly reports physical events.