Can you attempt to ride the Pegasus from your find greater steed even if you don’t have a saddle?

Why Sage Advice states that Shove & Grapple are not attacks?

How would you rule it? PC puts NPC into death saves with Sword of Wounding. At the start of NPC turn, 2 things happen:

Do the effects of Contagion start immediately?

Does dropping an item count as your one use of “interacting with an object”?

Does dropping an item count as your one use of “interacting with an object,” or can you drop an item as a “free/no action.”