The Barbarian's Rage damage is not being added to the damage die rolls even if you "activate" Rage by setting the switch on the Combat tab to the "on" position.
I also have to wonder what the sense is of having a switch on the Combat tab that you have to turn on to indicate that you're using Rage AND there's a checkbox/counter on the "Features & Traits" tab that you have to click manually to indicate you used one of your allotted Rages AND there's a checkbox/counter on the Combat page for "Enter Rage"! Why is the checkbox/counter there twice? Why doesn't turning on the switch for "Rage" on the Combat tab automatically remove one of the tick marks in the other places? And, why are the checkboxes/counters labelled differently on the two tabs?
Another problem: weapon masteries are not properly handled. For example, the Greataxe has the "Cleave" mastery property which lets you make a second attack against a different creature if you hit the first creature. But, you don't add your ability modifier score to that second attack. There's no way to do this - nothing is set up on the sheet for this. Whenever you roll damage, the ability modifier is added in.
Another problem: The Barbarian gets a feature at level 3 called "Primal Knowledge" which allows them to make ability checks as Strength checks while their rage is active even if the ability check would use a different ability. I don't see any way of setting that up.
Finally, another problem I see but one that is not specific to the Barbarian: there doesn't seem to be any way to specify a different ability score for weapons. Sure, if you drop a finesse weapon onto the sheet, it sets up a "Strength" attack and a "Dexterity" attack for the weapon. But, there are 2014 features that allow you to do that even if the weapon is not a finesse weapon. For example, The Way of the Kensai Monk allows you to choose weapons that are Monk weapons for you, which allows you to use your Dexterity for them. I could choose the longsword and use my Dexterity for attacks instead of Strength. I don't see any way of changing a weapon to use Dexterity instead of Strength or dropping a weapon onto the sheet that uses Dexterity instead of Strength. If the sheet is supposed to work for both 2014 and 2024 rules, this is a failure.