The young soldier cut a fine figure in his new uniform.
Here, the idiom 'Cut a fine figure' refers to-

• The young soldier cut a fine figure in his new uniform.
- Here, the idiom 'Cut a fine figure' refers to- ক) He made a good impression with his appearance.

• Cut a fine figure (also cut quite a figure/dash)
- English Meaning: to cause people to admire you because of your appearance.
- Bangla Meaning: কারো চেহারা বা পোশাক-পরিচ্ছদের দ্বারা লোকজনকে মুগ্ধ করা বা প্রশংসা অর্জন করা।

• Ex. Sentence: The young soldier cut a fine figure in his new uniform.
- Bangla Meaning: তরুণ সৈনিকটিকে তার নতুন ইউনিফর্মে দারুণ আকর্ষণীয় দেখাচ্ছিল।

Source:
1. Cambridge Dictionary.
2. Merriam-Webster Dictionary.