ref – https://www.grammar-monster.com/glossary/adjective_phrases.htm

An adjective phrase is a group of words headed by an adjective that describes a noun or a pronoun.

She had extremely menacing eyes.

She – subject
had – linking verb
extremely menacing – adjective phrase (group of words)
eyes – noun

The dog covered in mud is mine.

The dog – subject
covered in mud – adjective phrase
is – linking verb

This is called Attributive Adjective.

An attributive adjective typically sits before the noun it is modifying.

The beautifully carved frames are priceless.
(The adjective phrase is before the noun it modifies (“frames”). This is an attributive adjective phrase.)

She had blue eyes. (adjective)
She had extremely blue eyes.

She wore expensive shoes. (adjective)
She wore very expensive shoes. (adjective phrase)

An overly sensitive heart is not healthy.

I’m a fairly intelligent person.

The frames beautifully carved by monks are priceless.
(The adjective phrase is after the noun it modifies (“The frames”), but this time it’s an attributive adjective.)

Sarah was hostile towards me.

People are so sick of them.

The dog covered in mud looks pleased with himself.

(In this example, the first adjective phrase – even though it’s positioned after its noun (“The dog”) – is attributive because it appears inside the noun phrase “The dog covered in mud.” The second is predicative because it appears outside the noun phrase of the noun it modifies. Note how it is linked to its noun with a linking verb (“looks”).)