Yes, you can use essential oils to to make homemade candles. Make sure you add it into the wax mixture when creating it and never add it directly on the top of a pre-made candle because essential oils are flammable.
From my quick searches of 'essential oils for homemade candles' their recommended essential oil drops are between 30-45 drops. So maybeThen I do see blogs focused around aromatherapy suggesting 80-100 drops. 10 drops ismight not be enough. Trial and error are probably the best thing that could be done since it is several weeks before Christmas. It will give a couple weeks to try them out and see if it is the fragrance you are looking for.
In the blog by runtoradiance they mention about "flash points" related to high heat and soy candles, and how important it is to pick the right type of essential oil for diy scented candles. How hot and cold temperatures affect essential oils.
Also in the comments above it is going to take a couple weeks for the smell to fully develop in a home made candle. Just keep trying and see what is best scent wise to you.
Resources related to how much wax to add to home-made essential candles:
How to make essential oil candles: https://www.essentialoilhaven.com/how-to-make-candles-with-essential-oils/
Easy diy essential candles: https://www.runtoradiance.com/easy-diy-essential-oil-candles/
How hot and cold temps affect essential oils: https://www.theresaneoforthat.com/how-hot-and-cold-temperatures-affect-essential-oils/