Currently (Aug 05 2023) the last item was added Oct 22 2022, almost a year ago.
There are multiple reasons why:

1. I want to create balanced and interesting items, because if a item is too strong it is fun to use exactly once and if a item ist too weak nobody will use it. Balancing items is hard.

2. I want to create items that have the same quality as vanilla items, visually and functionally. Creating items that work in almost every scenario takes a lot of testing and creating visually pleasing textures takes very long.

3. I want to create unique items, with effects that do not exist in the game, while not every item is or has to have a special effect, most items should have interesting and fun properties.

4. I have not played much Terraria in the last year


Now looking to the future I will create a "beta" setting for the mod with incomplete items (placeholder textures and such)
That way hopefully more suggested items will make their way into the mod.

The main idea being players can take a look at new ideas and if they like them create textures/improvements for them.