Amado was scared the decommissioned Kawaki would then be destroyed, thus ruining his shot at using the teen's Karma mark to revive his deceased daughter.

Source: https://www.cbr.com/boruto-chapter-79-kawaki-may-kill-amado/

Combined with the circumstances of his death, which the season 3 ending explained was due to surgical complications, all this have led to rumors about Amado actually surviving, possibly to this day.

Source: https://screenrant.com/narcos-mexico-amado-carillo-death-alive-survive-theory/

However, considering that both Amado and Kawaki are aware that Code's powers are currently reduced by limiters put in his body, that statement still sounds like a huge slight towards Naruto and his abilities.

Source: https://screenrant.com/boruto-anime-made-naruto-nerf-even-worse-code/

However, this does not explain how or why Amado was able to get his hands on Shibai's remains, unless he also visited Earth at some point in the past.

Source: https://screenrant.com/boruto-omnipotence-otsutsuki-retconned-rewrote-naruto-entire-history/

Koji was created by Kara's Amado, ostensibly to be one of Jigen's top lieutenants.

Source: https://screenrant.com/boruto-koji-jiraya-clone-come-back-after-time-skip/