Hello, I was told to make a post here by customer service to get help with a question I gave them. 

I'm trying to make an item that doesn't exist in the current items on DnDBeyond in the homebrew area. They are Gloves of Dexterity. The way the item has been described by my DM is, they give me +1 to my dexterity modifier. Helping with all dexterity related checks/affected stats. Essentially, they are the same as modifying my dexterity score by 2 points to get +1 on my modifier.

I can't seem to craft these in the homebrew area and have it effect my stats correctly. Is there a way to create such an item?

You have two options. 

1.  Create a modifier with a type of Bonus, a subtype of Dexterity Score, and a fixed value of 2.  If they let your bonus go past +5, repeat with a subtype of Ability Score Maximum and an ability score of DEX. 
2.  Create a modifier with a type of Bonus, a subtype of Dexterity Ability Checks, and a fixed value of 1.  Repeat with a subtype of Dexterity Saving Throws, then repeat with a subtype of Dexterity Attacks. 

I recommend option 2. 

Out of curiosity, why would you recommend path 2? What benefits do you see in that solution vs the other?

Well, it's the one that comes closer to actually doing what your DM says the item does, but more importantly, the first version has the potential for several probably-unintended interactions.  Another interesting detail is that the second method lets your Dex bonus go past +10 if you can somehow raise your Dex to 30, but the first doesn't.