Eating before bed isn't inherently bad. It's just that many people have formed bad habits and eat more than their caloric requirement when they are tired, bored, and snacking. If you cut down a little in each meal of the day, you can still lose weight while eating before bed, it's just a matter of maintaining a caloric deficit. When you consume your calories technically doesn't matter.

Try eating something like baby carrots, maybe with some hummus or dip (but not a lot), before bed. Chopped veggies are great to fill up on because they have fiber and nutrients to fill you up, but barely any calories.

A small bowl of oatmeal has some more calories but is a great healthy middle ground, with all the fiber it offers. I flavor it with bananas, apples, dates, peanuts, raisins sometimes..

Google "protein snacks" and "protein balls" - easy to make, easy to eat through the day, and are a healthy mix of macros (made well they also can taste just like cookie dough!)