Asset purchased and placed in service in 2018 for $55k. Between 179 and bonus, it was fully depreciated that year.

Sold in 2021.

I am entering the sale price of of $47,500 on the asset entry worksheet.

Property Type "Trade or Business"

The worksheet states that the gain will flow to 4797 Part III.

After printing the return, the gain is not being displayed anywhere on the K-1 / 4797. 

It could be a basis issue, but mor inclined to believe something is not being checked.