What is the function of gerund phrase in this sentence Royce enjoyed his sailboat?

The sentence "Royce enjoyed his sailboat" doesn't contain a gerund phrase.

* Gerunds: are verbs ending in "-ing" that act as nouns.

* Gerund phrases: are groups of words that function as nouns, beginning with a gerund.

The sentence is simple and doesn't have a verb functioning as a noun, so it lacks a gerund phrase.