Approach with caution. If you misuse this you can get accused of bias or lose credibility. If it’s out context it also will present badly. If once in the middle of a match you tell the striker you loved his goal - no.
But…
“Good save” this is one way to sell a corner from a nick. You will look stupid if there wasn’t a touch though!
“Good tackle” similar. With problem players, a will timed “nice pass” or “good stuff” might help make you more human or less of an enemy.
But in all this if it feels uncomfortable for you, it’s probably double so for the players.
Just like every action/signal you take, every word you say can be and will be used against you in a difficult match. So, be careful. But also be natural (hard on the field).