Much-Muchly | Commonly Confused Words

Much

/mʌtʃ/

Used to indicate a large amount or degree of something.

That's much shorter!""It wasn't much fun for you tonight," he said.'Never was much of a fellow for talking.

Used to express a large amount or extent, often in a humorous or informal way

She was muchly appreciated by her peers.The film was muchly anticipated by fans worldwide.He was muchly rewarded for his brilliant idea.

Much is a common word used in many contexts and is widely accepted.
Muchly is not commonly used in modern English and might sound outdated.
Remember that much is standard, while muchly is rare and not typically necessary.