The idiom "come to light" means -

• The idiom "come to light" means - To become known or revealed.

• Come to light (idiom)
English Meaning: to become known.
Bangla Meaning: প্রকাশ পাওয়া/প্রকাশ হওয়া।

Example Sentence:
1. The truth about the scandalous affair didn't come to light until years later.
2. After extensive investigation, the facts behind the mysterious disappearance finally came to light.

Source:
1. merriam-webster.
2. Accessible Dictionary by Bangla Academy.