With the last 2 CBA's, most of these rookie contract negotiations are more formalities rather than hard extended negotiations. I believe 3rd rounders seem to have the most terms to negotiate so they can sometimes take the longest to settle.
So far the Colts have signed:
CB Darius Rush (5th Round)
S Daniel Scott (5th Round)
TE Will Mallory (5th Round)
RB Evan Hull (5th Round)
DE Titus Leo (6th Round)
CB Jaylon Jones (7th Round)
T Jake Witt (7th Round)
https://www.colts.com/news/will-mall...ks-signed-2023