Hi @Shamma_Rajpoot
We warmly welcome you to the Friendly King Community's Candy Crush Saga forum.🤗
According to your first screenshot, you can use a specific booster once per level, up to 10 minutes 24 seconds.
According to the next screenshot, you will not get the chance to use the free time booster for this level because there is no chance to select a specific booster for this level.
You won't find pre-game boosters on the in-game board.
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