I’ve done reward charts with varied success. I would pick the one specific behaviour that you’re really wanting to tackle and do a sticker chart for that one thing. Maybe the tooth brushing as it’s part of the bedtime routine and hopefully the rest of the routine will fall into place.
Keep the chart in the bathroom so it’s near and the sticker can be given straight away, or if your dc is a bathroom messer put it in the bedroom to encourage them to get out quickly. Really heap on the praise when they’ve done it, it will seem overboard but it really works.
The sticker and praise is sometimes reward enough but you could mark the chart and say “when you get this many you can have x”, x being something really small, a pack of stickers or crayons or a cheapish blind bag etc.
We do a Pom Pom jar too for both dcs to work together to fill. This is for non specific things like playing well together, helping around the house etc. When it’s full we have a treat jar for them to pick a reward from, these are more big ticket things like a trip to the cinema, bowling or a picnic etc.
You do have to be consistent though, even though it’s sometimes easier to give in. The heavy praise thing isn’t 100% natural to me but it really does work. Good luck.