We dont have option to select player for the man of the match, we are just entering in comments textbox, while entering match data.

Actually, I understand now. Man of the match has been replaced with MVP points. If you want to award a man of the match then do it via the comments or add it as 1 MVP point.

You can switch on MVP points via the Divisions section of the Setup menu

Does Q1 at https://www.cricketstatz.com/support-forum/questions/frequently-asked-questions help?

No. There is no option to enter Man of the Match Player while entering score. to dropdown list view available for this.

Either you dont have the correct team selected or you have not set up your teams as per Q1. Let me know which of these it is.