Ruby, 21 bytes

->x{x*?!!~/[^2!]|22/}

Using a regex is actually shorter, because joining an array also flattens it.

##How it works

->x{
 x*?! -> Join array using an exclamation mark
 !~ -> String does not contain
 /[^2!] -> characters different from '2' or '!'
 | -> or
 22/ -> '2' repeated at least twice
 }

Try it online!

Ruby, 21 bytes

->x{x*?!!~/[^2!]|22/}

Using a regex is actually shorter, because joining an array also flattens it.

How it works

->x{
 x*?! -> Join array using an exclamation mark
 !~ -> String does not contain
 /[^2!] -> characters different from '2' or '!'
 | -> or
 22/ -> '2' repeated at least twice
 }

Try it online!

Ruby, 21 bytes

->x{x*?!!~/[^2!]|22/}

Using a regex is actually shorter, because joining an array also flattens it.

Try it online!

Ruby, 21 bytes

->x{x*?!!~/[^2!]|22/}

Using a regex is actually shorter, because joining an array also flattens it.

##How it works

->x{
 x*?! -> Join array using an exclamation mark
 !~ -> String does not contain
 /[^2!] -> characters different from '2' or '!'
 | -> or
 22/ -> '2' repeated at least twice
 }

Try it online!