If you’re craving something sweet instead of eating food with added processed sugar substitute with something sweet but natural - fruit like strawberries, grapes, cherries, pineapple, etc. are all sweet enough that they can satisfy a sweet tooth. They have a good amount of sugar (but not processed sugar obviously) but are typically more satiating per calorie than junk food sugar.

Intermittent fasting is great to train your brain and body to not crave sugar, because it keeps insulin spikes down. Also, sometimes when your brain is craving sugar it’s really your body needing sodium. I read that it can be a mineral imbalance in which your body needs sodium but the signal to the brain gets crossed and you crave sugar. When I get cravings (especially while fasting) putting a few sea salt crystals on my tongue actually works to satisfy the craving maybe half of the time.