Yes—if you want the setup to focus closer, you may need to add optics or spacing similar to macro-photography accessories. The community suggestion was to try either:

• extension tubes, or
• close-up lens filters

These can shift the focusing range toward nearer subjects. In general, accessories that increase extension tend to improve close-focus ability, though they may also affect overall focusing range and image quality. Close-up optics can do something similar by altering the optical system so nearer subjects come into focus.

With an eyepiece-projection digiscoping setup, it’s normal for the usable focus range to change compared with the scope alone. So yes, there are ways to move the near-focus point inward, but it will likely take some experimentation to see which accessory gives the correction you need.