I just did some research and a lot of people are saying that honey is a good maple substitute. For low sugar, you can try this.
If the honey flavor is too potent, you can try experimenting with adding some vanilla extract and cinnamon powder.
Monkfruit is also good.
If you're trying to make pancakes or waffles, try mixing fruit in the batter such as peaches (antioxidants and many other benefits), bananas (potassium), blueberries (antioxidants), or dark chocolate (antioxidants, helps with blood pressure, and good stress-reliever). You can also add in the batter some cinnamon to make it super tasty too!
Aparently it already exists: https://www.amazon.co.uk/Natures-Hollow-Substitute-Diabetic-Xylitol/dp/B010AIER0K
However I'm not sure it will be any good, I think making sugar free honey that is used in a processed product require a much lower quality bar than sugar free honey by itself
Nature's Hollow, Sugar-Free Honey Substitute 14 Ounce, Non GMO, Keto Friendly, Gluten Free - 1 Pack https://www.amazon.com/dp/B010AIER0K/ref=cm_sw_r_cp_api_fabc_NKhVFbFFK8FP9?_encoding=UTF8&psc=1