My girl is 14 months and she only take 1 nap now... Previously she takes routine nap at least 3 times a day. Is this ok that is now down to just 1? She has endless energy throughout the day and goes to bed only at 10pm.

This is perfectly normal as the baby grows older they will consolidate their nap and sleep longer in that nap. If she seems tired before 10pm bedtime, try to wind down 1 hour before 10pm so to prepare her body to sleep earlier. This will take time to train her to sleep earlier say 8pm or 9pm.